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The Muscular System. What are muscles and what do they do?. An organ that can relax, contract, and move your body parts. Muscles. Contract. Relax. Relax. How are muscles controlled?. Voluntary muscles – muscles that you are able to control arm, leg, face

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Presentation Transcript
muscles
What are muscles and what do they do?

An organ that can relax, contract, and move your body parts.

Muscles

Contract

Relax

Relax

muscle control
How are muscles controlled?

Voluntary muscles – muscles that you are able to control

arm, leg, face

Involuntary muscles – muscles you don’t control consciously –

Stomach, intestines

Muscle Control
skeletal muscle
What is skeletal muscle?

Skeletal – move bones – most common

Tendons attach muscle to bone

Striated – has stripes

Voluntary

Skeletal Muscle

Striations

cardiac muscle
What is cardiac muscle?

Cardiac – found only in the heart

Has striations

Cardiac Muscle
smooth muscle
What is smooth muscle?

Smooth – internal organs (lining)

Not striated

Involuntary

Smooth Muscle
how do muscles work
How do muscles move your body?

Pairs of skeletal muscles work together

One set contracts while the opposing muscle relaxes

Biceps and triceps

How do muscles work?
how does the muscular system work with other systems
How does the muscular system work with other systems?
  • Skeletal system – muscles are attached to bone by tendons which help bone move
  • Digestive system – smooth muscle lines the organs of the digestive tract
diseases of the muscluar system
Diseases of the muscluar system
  • Muscular dystrophy- is an inherited disorder which causes the muscles in the body to become very weak. The muscles break down and are replaced with fatty deposits over time.
  • Fibromyalgia- diffuse chronic pain, fatigue and many other symptoms. It affects more women than men, mostly between ages 20 and 50.