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The Muscular System

muscles
by

Nathan Weatherly

on 13 March 2013

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Transcript of The Muscular System

The Muscular System By: Nathan Weatherly The muscular system is comprised of two different types of muscles. Muscle Types Voluntary muscles are muscles that you can contract and retract consciously. Involuntary Voluntary The muscular system functions in movement of the body or of materials through the body, maintenance of posture, and heat production. Skeletal Muscles Skeletal muscles are striated muscles that are attached to the bones. They are responsible for the movement of joints and bones. They make up approximately 50% of your body weight; in addition, 640 of your 650 muscles are skeletal! Skeletal muscles are arranged into different layers. The muscle layer closest to the skin is called the superficial layer, while the layer closest to the bone is the deep layer. A few examples of skeletal muscles are biceps, triceps, and deltoids. Cardiac Muscles Smooth Muscles Smooth muscles are nonstriated, involuntary muscles responsible for the movements and contractions of hollow organs such as the bladder and blood vessels. Like skeletal muscles, they are arranged into layers. The fibers in each layer are facing a different direction so the muscle can contract in all directions. Involuntary muscles are muscles are muscles you can't consciously control. Cardiac muscles are located only in the heart. Cardiac muscle cells are striped (striated) like skeletal muscle cells. Involuntarily, cardiac muscles continuously contract and retract your heart until you die. The average person's heart beats around 100,000 times a day. Rhabdomyolysis is the breakdown of muscle fibers that causes the release of myoglobin into the bloodstream; myoglobin can cause damage to the kidneys. Symptoms include abnormal urine color, decreased urine production, fatigue, muscle stiffness or aching, and muscle tenderness. Rhabdomyosis Diseases Associated with the Muscular System Polymyositis Polymyositis is a disease that causes inflammation and weakness in the skeletal muscles. Symptoms include difficulty swallowing, muscle pain, fever, shortness of breath, joint pain, loss of appetite, morning stiffness, weight loss, muscle weakness, and voice problems. Myopathy Myopathy is a disease that causes the muscle fibers in skeletal muscles to malfunction making them weak. Symptoms include weakness, stiffness, cramps, and spasms of the muscles. Syndromes Associated with the Muscular System Chronic Fatigue Syndrome Chronic fatigue syndrome is a disease that causes severe tiredness that cannot be relieved by rest. CFS is not caused by any other medical conditions Chronic Compartment Syndrome Chronic compartment syndrome is induced by repetitive impact and causes the lower leg to become stiff and swollen. Isaac's Syndrome Isaac's syndrome is continuous muscle fiber activity . Isaac's syndrome causes twitching, spasms, cramping, sweating, slower reflexes, (very seldom) numbness, and pain in the muscles. Muscular Dystrophy Muscular dystrophy is a hereditary issue that causes the decrease in muscle tissue and strength. It gradually becomes more and more severe over time. Muscular dystrophy can cause:
Weakness
Delayed development of muscle motor skills
Difficulty using one or more muscle groups
Drooling
Eyelid drooping (ptosis)
Frequent falls
Loss of strength in a muscle or group of muscles as an adult
Loss in muscle size
Problems walking Muscle Groups Health Tips for Your Muscles Be sure to follow the Food Pyramid
Avoid refined grains such as white bread and white rice
Replace refined grains with whole grains
Eat plenty of fruits and vegetables
Avoid eating more than the recommended amount of fruit
Select lowfat or nonfat dairy products
Get your protein from meat, poultry, fish, nuts, eggs and beans
Stretch frequently Benefits of Healthy Muscles Less chance of injuries
More strength to help with daily tasks
Helps with weight control
Lowered blood pressure
Increasing bone strength
Helps fight off chronic diseases
Improving your mood
Boosts heart health
Enjoy your life more
Live longer There are three different groups of muscles. These three groups are much more narrow than voluntary and involuntary muscles. Hereditary Issues
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