Combined with the cardiovascular system, the circulatory system helps to fight off disease, helps the body maintain a normal body temperature, and provides the right chemical balance to provide the body’s homeostasis, or state of balance among all its systems.
The circulatory system consists of four major components:
The Heart: About the size of two adult hands held together, the heart rests near the center of the chest. Thanks to consistent pumping, the heart keeps the circulatory system working at all times.
Arteries: Arteries carry oxygen-rich blood away from the heart and where it needs to go.
Veins: Veins carry deoxygenated blood to the lungs where they receive oxygen.
Blood: Blood is the transport media of nearly everything within the body. It transports hormones, nutrients, oxygen, antibodies, and other important things needed to keep the body healthy.
Oxygen enters the bloodstream through tiny membranes in the lungs that absorb oxygen as it is inhaled. As the body uses the oxygen and processes nutrients, it creates carbon dioxide, which your lungs expel as you exhale. A similar process occurs with the digestive system to transport nutrients, as well as hormones in the endocrine system. These hormones are taken from where they are produced to the organs they affect.
The circulatory system works thanks to constant pressure from the heart and valves throughout the body. This pressure ensures that veins carry blood to the heart and arteries transport it away from the heart. (Hint: to remember which one does which, remember that that “artery” and “away” both begin with the letter A.)
There are three different types of circulation that occur regularly in the body:
Pulmonary circulation: This part of the cycle carries oxygen-depleted blood away from the heart, to the lungs, and back to the heart.
Systemic circulation: This is the part that carries oxygenated blood away from the heart and to other parts of the body.
Coronary circulation: This type of circulation provides the heart with oxygenated blood so it can function properly
Regulate blood volume and composition (e.g. sodium, potassium and calcium)
Regulate blood pressure.
Regulate pH homeostasis of the blood.
Contributes to the production of red blood cells by the kidney.
Helps synthesize calcitrol the (active form of Vitamin D).
Introduction to the urinary system
The urinary system consists of all the organs involved in the formation and release of urine. It includes the kidneys, ureters, bladder and urethra.
The kidneys are bean-shaped organs which help the body produce urine to get rid of unwanted waste substances. When urine is formed, tubes called ureters transport it to the urinary bladder, where it is stored and excreted via the urethra. The kidneys are also important in controlling our blood pressureand producing red blood cells.
Components of the urinary system
Kidneys and ureters
The kidneys are large, bean-shaped organs towards the back of the abdomen (belly). They lie behind a protective sheet of tissue within the abdomen. The kidneys perform many vital functions which are important in everyday life. For example, they help us get rid of waste products by making urine and excreting it from the body. A special system of tubes within the kidneys allow substances such as sodium (salt) and chloride to be filtered.
The kidneys regulate the amount of water in the body. Humans produce about 1.5 litres of urine a day. However, if we drink more water, we may produce more urine. On hot days, if we get dehydrated and sweat more, we may produce less urine. This is why it’s very important to drink lots of water on hot summer days.
The kidneys also produce renin (a hormone important in regulating blood pressure) and erythropoietin(helps produce red blood cells).
Located in the lower part of our bellies, the right kidney is slightly lower in position than the left, allowing room for the liver. The kidneys are reddish brown in colour and measure about 10 cm in length, 5 cm width and 2.5 cm thick. On the side of the kidney with the smaller curve is an opening called the hilum, where blood vessels, nerves, and the ureters enter the kidney. On one end of the ureters is a funnel-shaped expansion, called the renal pelvis, where urine collects. The ureters carry urine to the bladder; they are 25–30 cm long tubes lined with smooth muscle. The muscular tissue helps force urine downwards. The ureters enter the bladder at an angle, so urine doesn’t flow up the wrong way.
The kidney can be divided into two distinct regions. There is an outer red-brown part (cortex) and inner lighter coloured part (medulla). The cortex is made up of special units called corpuscles, nephrons, and a system of straight and curvy collecting tubules supplied by many blood vessels. In the outer part of the kidney, there are many nephrons which act as filtering units. Each nephron is supplied by a ball of small blood vessels, called glomeruli. A diagram of a single glomerulus is seen below. Blood is filtered through the small blood vessels to produce a mixture that is the precursor of urine. This mixture then passes through more tubules, where water, salt and nutrients are reabsorbed.
The inner part of the kidney (the medulla) is a continuation of the specialized nephrons in the kidney. A small blood vessel network called the vasa recta supplies the medulla. Each kidney is supplied by the renal arteries, which give off many smaller branches to the surrounding parts of the kidneys. Renal veins drain the kidney.
Bladder
The bladder is a pyramid-shaped organ which sits in the pelvis (the bony structure which helps form the hips). The main function of the bladder is to store urine and, under the appropriate signals, release it into a tube which carries the urine out of the body. Normally, the bladder can hold up to 500 mL of urine. The bladder has three openings: two for the ureters and one for the urethra (tube carrying urine out of the body).
The bladder consists of smooth muscles. The main muscle of the bladder is called the detrusor muscle. Muscle fibres around the opening of the urethra forms a ring-like muscle that controls the passage of urine. When we want to urinate, stretch receptors in the bladder are activated, which send signals to our brain and tell us that the bladder is full. The ring-like muscle relaxes and the detrusor muscle contracts, allowing urine to flow.
The blood supply of the bladder is from many blood vessels. Some of these blood vessels are named: the vesical arteries, the obturator, uterine, gluteal and vaginal arteries. In females, a venous network drains blood from the bladder arteries into the internal iliac vein. Nervous control of the bladder involves centres located in the brain and spinal cord.
Urethra
The male urethra is 18–20 cm long, running from the bladder to the tip of the penis. The male urethra is supplied by the inferior vesical and middle rectal arteries. The veins follow these blood vessels. The nerve supply is via the pudendal nerve.
The female urethra is 4–6 cm long and 6 mm wide. It is a tube running from the bladder neck and opening into an external hole located at the top of the vaginal opening. As the female urethra is shorter than the male urethra, it is more likely to get infections from bacteria in the vagina. The female urethra is supplied by the internal pudendal and vaginal arteries.
Your digestive system is uniquely designed to turn the food you eat into nutrients, which the body uses for energy, growth and cell repair. Here's how it works.
The mouth is the beginning of the digestive tract. In fact, digestion starts here as soon as you take the first bite of a meal. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the process of breaking it down into a form your body can absorb and use.
Throat
Also called the pharynx, the throat is the next destination for food you've eaten. From here, food travels to the esophagus or swallowing tube.
Esophagus
The esophagus is a muscular tube extending from the pharynx to the stomach. By means of a series of contractions, called peristalsis, the esophagus delivers food to the stomach. Just before the connection to the stomach there is a "zone of high pressure," called the lower esophageal sphincter; this is a "valve" meant to keep food from passing backwards into the esophagus.
Stomach
The stomach is a sac-like organ with strong muscular walls. In addition to holding the food, it's also a mixer and grinder. The stomach secretes acid and powerful enzymes that continue the process of breaking down the food. When it leaves the stomach, food is the consistency of a liquid or paste. From there the food moves to the small intestine.
Small Intestine
Made up of three segments, the duodenum, jejunum, and ileum, the small intestine is a long tube loosely coiled in the abdomen (spread out, it would be more than 20 feet long). The small intestine continues the process of breaking down food by using enzymes released by the pancreas and bile from the liver. Bile is a compound that aids in the digestion of fat and eliminates waste products from the blood. Peristalsis (contractions) is also at work in this organ, moving food through and mixing it up with digestive secretions. The duodenum is largely responsible for continuing the process of breaking down food, with the jejunum and ileum being mainly responsible for the absorption of nutrients into the bloodstream
Three organs play a pivotal role in helping the stomach and small intestine digest food:
Pancreas
Among other functions, the oblong pancreas secretes enzymes into the small intestine. These enzymes break down protein, fat, and carbohydrates from the food we eat.
Liver
The liver has many functions, but two of its main functions within the digestive system are to make and secrete bile, and to cleanse and purify the blood coming from the small intestine containing the nutrients just absorbed.
Gallbladder
The gallbladder is a pear-shaped reservoir that sits just under the liver and stores bile. Bile is made in the liver then if it needs to be stored travels to the gallbladder through a channel called the cystic duct. During a meal, the gallbladder contracts, sending bile to the small intestine.
Once the nutrients have been absorbed and the leftover liquid has passed through the small intestine, what is left of the food you ate is handed over to the large intestine, or colon.
Colon (Large Intestine)
The colon is a 5- to 6-foot-long muscular tube that connects the cecum (the first part of the large intestine to the rectum (the last part of the large intestine). It is made up of the cecum, the ascending (right) colon, the transverse (across) colon, the descending (left) colon, and the sigmoid colon (so-called for its "S" shape; the Greek letter for S is called the sigma), which connects to the rectum.
Stool, or waste left over from the digestive process, is passed through the colon by means of peristalsis (contractions), first in a liquid state and ultimately in solid form as the water is removed from the stool. A stool is stored in the sigmoid colon until a "mass movement" empties it into the rectum once or twice a day. It normally takes about 36 hours for stool to get through the colon. The stool itself is mostly food debris and bacteria. These bacteria perform several useful functions, such as synthesizing various vitamins, processing waste products and food particles, and protecting against harmful bacteria. When the descending colon becomes full of stool, or feces, it empties its contents into the rectum to begin the process of elimination.
Rectum
The rectum (Latin for "straight") is an 8-inch chamber that connects the colon to the anus. It is the rectum's job to receive stool from the colon, to let you know there is stool to be evacuated, and to hold the stool until evacuation happens. When anything (gas or stool) comes into the rectum, sensors send a message to the brain. The brain then decides if the rectal contents can be released or not. If they can, the sphincters (muscles) relax and the rectum contracts, expelling its contents. If the contents cannot be expelled, the sphincters contract and the rectum accommodates, so that the sensation temporarily goes away.
Rectum
The rectum (Latin for "straight") is an 8-inch chamber that connects the colon to the anus. It is the rectum's job to receive stool from the colon, to let you know there is stool to be evacuated, and to hold the stool until evacuation happens. When anything (gas or stool) comes into the rectum, sensors send a message to the brain. The brain then decides if the rectal contents can be released or not. If they can, the sphincters (muscles) relax and the rectum contracts, expelling its contents. If the contents cannot be expelled, the sphincters contract and the rectum accommodates, so that the sensation temporarily goes away.
Anus
The anus is the last part of the digestive tract. It consists of the pelvic floor muscles and the two anal sphincters (internal and external muscles). The lining of the upper anus is specialized to detect rectal contents. It lets us know whether the contents are liquid, gas, or solid. The pelvic floor muscle creates an angle between the rectum and the anus that stops stool from coming out when it is not supposed to. The anal sphincters provide fine control of stool. The internal sphincter keeps us from going to the bathroom when we are asleep, or otherwise unaware of the presence of stool. When we get an urge to go to the bathroom, we rely on our external sphincter to keep the stool in until we can get to the toilet.
Unlike a woman, most of a man’s reproductive system is located outside of his body. These external structures include the penis, the scrotum, and the testicles.
Male Reproductive Anatomy
The organs of the male reproductive system are specialized for the following functions:
To produce, maintain and transport sperm (the male reproductive cells) and protective fluid (semen)
To discharge sperm within the female reproductive tract
To produce and secrete male sex hormones
The male reproductive anatomy includes internal and external structures.
What are the external male reproductive structures?
Most of the male reproductive system is located outside of the man’s abdominal cavity or pelvis. The external structures of the male reproductive system are the penis, the scrotum and the testicles.
Penis — The penis is the male organ for sexual intercourse. It has three parts: the root, which attaches to the wall of the abdomen; the body, or shaft; and the glans, which is the cone-shaped end of the penis. The glans, which also is called the head of the penis, is covered with a loose layer of skin called foreskin. (This skin is sometimes removed in a procedure called circumcision.) The opening of the urethra, the tube that transports semen and urine, is at the tip of the glans penis. The penis also contains a number of sensitive nerve endings.
The body of the penis is cylindrical in shape and consists of three internal chambers. These chambers are made up of special, sponge-like erectile tissue. This tissue contains thousands of large spaces that fill with blood when the man is sexually aroused. As the penis fills with blood, it becomes rigid and erect, which allows for penetration during sexual intercourse. The skin of the penis is loose and elastic to allow for changes in penis size during an erection.
Semen, which contains sperm, is expelled (ejaculated) through the end of the penis when the man reaches sexual climax (orgasm). When the penis is erect, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.
Scrotum — The scrotum is the loose pouch-like sac of skin that hangs behind the penis. It contains the testicles (also called testes), as well as many nerves and blood vessels. The scrotum has a protective function and acts as a climate control system for the testes. For normal sperm development, the testes must be at a temperature slightly cooler than the body temperature. Special muscles in the wall of the scrotum allow it to contract (tighten) and relax, moving the testicles closer to the body for warmth and protection or farther away from the body to cool the temperature.
Testicles (testes) — The testes are oval organs about the size of very large olives that lie in the scrotum, secured at either end by a structure called the spermatic cord. Most men have two testes. The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm. Within the testes are coiled masses of tubes called seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.
Epididymis — The epididymis is a long, coiled tube that rests on the backside of each testicle. It functions in the carrying and storage of the sperm cells that are produced in the testes. It also is the job of the epididymis to bring the sperm to maturity, since the sperm that emerge from the testes are immature and incapable of fertilization. During sexual arousal, contractions force the sperm into the vas deferens.
What are the internal male reproductive organs?
The internal organs of the male reproductive system, also called accessory organs, include the following:
Vas deferens — The vas deferens is a long, muscular tube that travels from the epididymis into the pelvic cavity, to just behind the bladder. The vas deferens transports mature sperm to the urethra in preparation for ejaculation.
Ejaculatory ducts — These are formed by the fusion of the vas deferens and the seminal vesicles. The ejaculatory ducts empty into the urethra.
Urethra — The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of expelling (ejaculating) semen when the man reaches orgasm. When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.
Seminal vesicles — The seminal vesicles are sac-like pouches that attach to the vas deferens near the base of the bladder. The seminal vesicles produce a sugar-rich fluid (fructose) that provides sperm with a source of energy and helps with the sperms’ motility (ability to move). The fluid of the seminal vesicles makes up most of the volume of a man’s ejaculatory fluid, or ejaculate.
Prostate gland — The prostate gland is a walnut-sized structure that is located below the urinary bladder in front of the rectum. The prostate gland contributes additional fluid to the ejaculate. Prostate fluids also help to nourish the sperm. The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland.
Bulbourethral glands — The bulbourethral glands, or Cowper’s glands, are pea-sized structures located on the sides of the urethra just below the prostate gland. These glands produce a clear, slippery fluid that empties directly into the urethra. This fluid serves to lubricate the urethra and to neutralize any acidity that may be present due to residual drops of urine in the urethra.
How does the male reproductive system function?
The entire male reproductive system is dependent on hormones, which are chemicals that stimulate or regulate the activity of cells or organs. The primary hormones involved in the functioning of the male reproductive system are follicle-stimulating hormone (FSH), luteinizing hormone (LH) and testosterone.
FSH and LH are produced by the pituitary gland located at the base of the brain. FSH is necessary for sperm production (spermatogenesis), and LH stimulates the production of testosterone, which is necessary to continue the process of spermatogenesis. Testosterone also is important in the development of male characteristics, including muscle mass and strength, fat distribution, bone mass and sex drive.
Problems with Male Reproductive System
The male reproductive system consists of organs and structures which are quite complicated and don’t always work property. As a result, problems can result, some more serious than others. Some common problems include:
The female reproductive system is designed to carry out several functions. It produces the female egg cells necessary for reproduction, called the ova or oocytes. The system is designed to transport the ova to the site of fertilization. Conception, the fertilization of an egg by a sperm, normally occurs in the fallopian tubes. The next step for the fertilized egg is to implant into the walls of the uterus, beginning the initial stages of pregnancy. If fertilization and/or implantation does not take place, the system is designed to menstruate (the monthly shedding of the uterine lining). In addition, the female reproductive system produces female sex hormones that maintain the reproductive cycle.
The internal reproductive organs in the female include:
Vagina: The vagina is a canal that joins the cervix(the lower part of uterus) to the outside of the body. It also is known as the birth canal.
Uterus (womb): The uterus is a hollow, pear-shaped organ that is the home to a developing fetus. The uterus is divided into two parts: the cervix, which is the lower part that opens into the vagina, and the main body of the uterus, called the corpus. The corpus can easily expand to hold a developing baby. A channel through the cervix allows sperm to enter and menstrual blood to exit.
Ovaries: The ovaries are small, oval-shaped glands that are located on either side of the uterus. The ovaries produce eggs and hormones.
Fallopian tubes: These are narrow tubes that are attached to the upper part of the uterus and serve as tunnels for the ova (egg cells) to travel from the ovaries to the uterus. Conception, the fertilization of an egg by a sperm, normally occurs in the fallopian tubes. The fertilized egg then moves to the uterus, where it implants into the lining of the uterine wall.
Diseases of the female reproductive system
Many parts of the male and female reproductive systems can be affected by cancer. In females, cancer can attack the uterus, ovaries, breast and cervix, among other organs, according to the American Cancer Society.
Many experts have seen what they refer to as the "Angelina Jolie" effect, where women are taking proactive measures by having breasts and internal reproductive organs removed if they have a family history of cancer before there are signs of the disease. "With better genetic testing and screening, we have seen a number of women who are being more proactive about their reproductive health," said Dr. Shana Wingo, who specializes on gynecologic oncology at Arizona Oncology.
Ovarian cancer tends to have a poorer outcome than other gynecological cancers, Ross noted, because it is not typically diagnosed until it has progressed significantly. "There is no standard screening available for ovarian cancer, so it is very difficult to identify it early."
Tests to detect ovarian cancer, as well as cancer of the fallopian tube, and primary peritoneal cancer are currently being studied, according to the National Cancer Institute.
There are two tests used to screen for cervical cancer. The Pap test screens for cellular changes in the cervix called cytology, while the genital human papillomavirus (HPV) test identifies the presence of infection with high-risk HPV, the strains that are linked to cervical cancer, according to Dr. Charles Dubin, an OB/GYN in Santa Monica, Calif.
A recent study published by Cancer Cytopathology, found that HPV-only screening misses more cervical cancer in women than Pap-only or co-testing, based on approximately 8.6 million women ages 30 to 65. There is approximately a three-fold improvement in the cancer detection rate of co-testing compared to HPV only.
Current guidelines recommend that women first start getting the Pap test alone when they turn 21 and repeat every three years if the test is normal until age 30. A Pap-plus-HPV test, or co-testing, is recommended for women ages 30 to 65, and if both are negative repeated every five years, regardless of whether they have received HPV vaccination. "However, there is compelling scientific evidence that co-testing every three years misses less cases of cancer and pre-cancer than every five-year co-testing," Dubin noted.
While genital HPV is typically associated with females, it is the most common sexually transmitted infection. The majority of sexually active people in the United States — male and female — will have HPV at some time in their lives, but most will not experience any symptoms. In a small portion of women, it can result in cervical cancer and genital warts; in men, it can cause penile and anal cancer and genital warts, according to the NIH.
Both genders can develop sexually transmitted diseases, including genital herpes, gonorrhea and syphilis, according to the National Institutes of Health (NIH). HIV/AIDS, a disease of the immune system, is not exclusively transmitted through sexual contact; sexual activity is one of the ways that the HIV virus is spread.
For females, severe menstrual cramping, or dysmenorrheal, is the most common disease of the reproductive system occurs with a woman's monthly menstrual period, according to Dr. Sheryl Ross, OB/GYN and Women's Health Specialist at Providence Saint John’s Health Center.
"Severe pain before or during your period can last anywhere from one to seven days and disrupt your normal day-to-day routines at school, work and socially," Ross noted. Diagnosis is made by the patient's medical history and a pelvic exam. The best treatment includes medications that block the effects of prostaglandins and include ibuprofen and naproxen. The birth control pill also works well in treating dysmenorrhea by decreasing the blood flow, Ross noted.
Another common disorder of the female reproductive system is a vaginal yeast infection, which is caused by a yeast fungus in the vagina. Most can be successfully treated with over-the-counter medications, according to WebMD.
Endometriosis is a condition where that normally lines the inside of your uterus — the endometrium — ends up outside of uterus, most commonly in the ovaries, bowel or the tissue lining your pelvis. The endometrial tissue becomes trapped, causing pain, according to the Mayo Clinic.
Pelvic inflammatory disease can involve an infection of any of the female reproductive organs, including the uterus and ovaries. Sexually transmitted diseases, such as gonorrhea and chlamydia, are typical causes of pelvic inflammatory disease, according to the NIH. "Any of these STIs can cause serious and potentially long term reproductive problems that include chronic pelvic pain and infertility," Ross said.
To collect sensory input from the body and external environment.
To process and interpret the sensory input.
To respond appropriately to the sensory input.
Parts of Nervous System
Nervous System:
Nervous System (Source: TheEmirr/Wikipedia)
Nervous system is the chief controlling and coordinating system of the body. It controls and regulates all activities of the body, whether voluntary or involuntary, and adjusts the individual (organism) to the given surroundings. This is based on the special properties of sensitivity, conductivity and responsiveness of the nervous system.
The protoplasmic extensions of the nerve cells form the neural pathways called nerves. The nerves resemble the electricity wires. Like the electric current flowing through the wires, the impulses (sensory and motor) are conducted through the nerves.
The sensory impulses are transmitted by the sensory (afferent) nerves from the periphery (skin, mucous membranes, muscles, tendons, joints, and special sense organs) to the central nervous system (CNS). The motor impulses are transmitted by the motor (efferent) nerves from the central nervous system to the periphery (muscles and glands).
Thus the CNS is kept continuously informed about the surroundings (environment) through various sensory impulses, both general and special. The CNS in turn brings about necessary adjustment of the body by issuing appropriate orders which arc passed on as motor impulses to the muscles, vessels, viscera and glands. The adjustment of the organism to the given surroundings is the most important function of the nervous
Central nervous system (CNS) includes:
CENTRAL NERVOUS SYSTEM
Brain or encephalon, which occupies cranial cavity, and contains the higher governing centers.
Spinal cord or spinal medulla, which occupies upper two-thirds of the vertebral canal, and contains many reflex centers.
Peripheral nervous system (PNS) includes:
Peripheral Nervous System (In Blue)
Cerebrospinal nervous system is the somatic component of the peripheral nervous system, which includes 12 pairs of cranial nerves and 31pairs of spinal nerves. It innervates the somatic structures of the head and neck, limbs and body wall, and mediates somatic sensory and motor functions.
Peripheral autonomic nervous system is the visceral component of the peripheral nervous system, which includes the visceral or splanchnic nerves that are connected to the CNS through the somatic nerves. It innervates the viscera, glands, blood vessels and non-striated muscles, and mediates the visceral functions.
The muscular system creates movement. The primary function of muscular system is to produce voluntary gross and fine movements. ...
It protects the organs. ...
The cardiac muscle pumps blood. ...
Smooth muscle aids digestion. ...
Smooth muscle ensures blood flow.
There are three types of muscle tissue:
Skeletal muscle: This type of muscle creates movement in the body. There are more than 600 skeletal muscles, and they makes up about 40 percent of a person’s body weight. When the nervous system signals the muscle to contract, groups of muscles work together to move the skeleton. These signals and movements are nearly involuntary, yet they do require conscious effort. However, humans do not need to concentrate on individual muscles when moving.
Cardiac muscle: Cardiac muscle is involuntary muscle. This type makes up the walls of the heart and creates the steady, rhythmic pulsing that pumps blood through the body from signals from the brain. This muscle type also creates the electrical impulses that produce the heart’s contractions, but hormones and stimuli from the nervous system can also affect these impulses, such as when your heart rate increases when you’re scared.
Smooth muscle: Smooth muscle makes up the walls of hollow organs, respiratory passageways, and blood vessels. Its wavelike movements propel things through the bodily system, such as food through your stomach or urine through your bladder. Like cardiac muscle, smooth muscle is involuntary and also contracts in response to stimuli and nerve impulses.
Muscle movement happens when neurological signals produce electrical changes in muscle cells. During this process, calcium is released into the cells and brings about a short muscle twitch. Problems with the junction between the cells — called a synapse — can lead to neuromuscular diseases.
Muscle pain is a common issue that can signal numerous problems, even if it’s something as simple as overuse. Some muscular disorders and conditions that affect muscles include:
Muscle pain
Sprains and strains
Bruising
Cramping
Myopathy
Muscular dystrophy
Parkinson’s disease
Fibromyalgia
Multiple sclerosis
Proper nutrition and exercise is important to keeping all muscles healthy, whether they are cardiac, smooth, or skeletal.
