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Muscular System

Muscular System. Muscles of the Body. Every human has over 600 muscles. Muscles allow you to move your body in different ways by pulling on the bones to which they are attached. THINK! – What tissue connects muscle to bone? Tendon. Muscles of the Body. Muscle Types. Skeletal

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Muscular System

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  1. Muscular System

  2. Muscles of the Body • Every human has over600 muscles. • Muscles allow you to move your body in different ways bypulling on the bones to which they are attached. • THINK! – What tissue connects muscle to bone? • Tendon

  3. Muscles of the Body

  4. Muscle Types • Skeletal • This muscle appears striated or striped under the microscope. • This muscle is voluntary, meaning you control when you want it to work. • They react quickly and tire quickly. • Smooth • This muscle appears smooth. It has NO striations. • These muscles are involuntary, meaning you do not control them. • These muscles work on their own to move food through the digestive system or to keep blood moving through the veins and arteries. • They react slowly and tire slowly. • Cardiac • This muscle is heart muscle. • It is similar to smooth muscle in that it is involuntary. • It is similar to skeletal muscle in that it has striations. • They never tire.

  5. Muscle Types

  6. How Muscles Work • Muscles work in pairs. • One muscle in a pair is the flexor. This muscle contracts to bring a limb closer to the body. • The other muscle is the extensor. It allows the limb to extend. • When one muscle contracts the other relaxes. • Clip: Biceps & Triceps

  7. THINK!- What does each face muscle do?

  8. Muscles Gone Wrong! • Delayed Onset Muscle Soreness • The “achy” feeling the day after you exercise • Scientists not sure exactly what causes it but there are a few ideas • Reduced blood flow to muscle during exercise • Exercise causes tiny tears in the muscle • Overstretching damages the tissue around muscle

  9. Muscles Gone Wrong! • ALS (Amylotrophic lateral sclerosis) • Also known as Lou Gehrig’s disease • A break down of nerve cells in the brain and spinal cord • Over time, muscles weaken and paralysis sets in

  10. Muscles Gone Wrong! • Parkinson’s Disease • Damage to a group of nerves in the brain that control body movements • Symptoms include • Tremors of hands • Stiffness of movements (trouble walking or talking) • Mask-like face

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