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Muscular System

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Lacey Strahm

on 7 January 2014

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Transcript of Muscular System

Muscular System
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture, and circulates blood throughout the body.

Muscular System

Types of Muscle
Muscles Work
1)Nerves send messages to muscle cells, which are also known as fibers, commanding them to contract, or shorten and thicken, to move a bone.

2) Many skeletal muscles do this by working in pairs.
One muscle in the pair contracts to move the bone in one direction and then the other muscle in the pair contracts to move the bone back.
ex (muscle pair): biceps and triceps
When a biceps contracts and a triceps relaxes, your arm bends. Your arm straightens when a biceps relaxes and a triceps contracts.
Muscle Tone
A slight, constant tension in muscles is
muscle tone
. For example, at any given moment the muscles in your neck contract just enough to keep your head upright, even when your not moving your head. Muscle tone keeps your muscles healthy and ready for action. Muscles that cannot contract due to injury, or are not used often, will weaken and shrink, a condition known as
Keeping Healthy
Keeping Healthy
Some types of exercise increase
muscle endurance
which is how long a muscle can contract without tiring.
ex: running
Other types of exercises increase muscle thickness and strength by making individual fibers grow.
ex: lifting
Types of Muscle
Your body has 3 types of muscle tissue.
Smooth Muscle
: involuntary muscle that causes movements within your body.
ex: smooth muscles in blood vessels help circulate your blood
Cardiac Muscle
: involuntary muscle found only in the heart.
ex: cardiac muscle allows heart to beat and pump blood throughout the body
Skeletal Muscle
: are the muscles that you control to do activities, attached to the bones of your skeleton by thick strands of tissue called
of the Muscular System
The muscular system is an important system in the human body because without it, life will completely stop. Muscles produce not only those movements that are under the control of our will and that we can see and feel, but also those movements that are responsible for activities like breathing, digestion of food, pumping of blood etc
Keeping a Healthy Diet
A healthy diet is important in keeping muscles healthy. Workouts and activities do help in building muscle, but keeping a well-balanced diet is essential to your muscle health. It helps fuel your exercise sessions and repair muscle fibers. Proteins, fats, carbohydrates, vitamins, minerals and fluids are all essential to your diet. While there are plenty of foods in the food groups to help with muscles, there are certain substances key to keeping your muscles in shape.
Mistreated Muscles
muscle strain
, or a pulled muscle, is a painful injury that occurs when muscles are overworked or are not stretched properly.
is the overuse of tendons that leads to painful swelling and irritation.
Keeping Healthy
To increase muscle size and strength, some athletes are tempted to use
anabolic steroids
, artificial forms of the male hormone testosterone. Doctors prescribe these drugs to treat people with certain muscle disorders. However when uses for non medical purposes anabolic steroids can be dangerous and can cause serious damage to many body systems.
How Muscles Work
You can maintain a healthy muscular system by regularly participating in different types of exercise. To help prevent injuries, exercise sessions should include a warm-up and cool-down period. Warm up exercises include things such as jumping jacks. Cool down exercises include stretching and hydrating.
Here are specific foods essential to keeping muscles fit and functioning.
lean meats
whole-wheat bread
low-fat milk
flax seed
baked potatoes
a Healthy Diet
Muscle Issues
Stretching properly and drinking plentiful amounts of water before and during exercise can help you avoid muscle cramps and pains.
Recap Video
Muscular System Song
Different Muscles In Your Body
Full transcript