The Muscular System Ch. 15.3

1
The Muscular System Ch. 15.3

• Smooth Muscle is found in the digestive tract and
  the walls of blood vessels.
• Cardiac Muscle is found only in the heart.
• Skeletal Muscle is attached to the bones and
  helps you move. It also helps protect your inner
  organs.

2
2 Types of Muscle Action

• Muscle action that is under your control is
  voluntary.
• Muscle action that is not under your control is
  involuntary.

3

• Aerobic exercise is exercise like cycling or
  running that improves your hearts ability to
  pump oxygen rich blood efficiently through your
  body
• Resistance exercise is working against the weight
  of an object to build muscle strength and size
  (push ups, weightlifting)

4

• Flexor- a muscle that bends part of your body
• Extensor- a muscle that straightens part of your
  body
• Tendon- tissue that connects skeletal muscle to
  bones
• Tendinitis- a condition in which the tendon
  becomes inflamed