Download HBS Ch.1 Sec.4

The Muscular System
Chapter 1 Section 4
Pages: 24 - 28
Objective: Describe the function of muscles and tendons
Objective: Analyze how the skeletal and muscular systems work
together to coordinate body movement
Objective: Identify the three types of muscle tissue and describe
Their functions.
1. Involuntary Muscles: Not under your conscious control.
Responsible for breathing and digesting food.
2. Voluntary Muscles: Under your control. Responsible for
Such actions as smiling, raising your hand, sitting, etc.
3. Skeletal Muscles: Attached to the bones of your skeleton.
Provides the force that moves your bones. They are striated,
Voluntary, and react quickly as well as tire quickly
4. Tendons: Strong connective tissue that attaches muscles to
Bone.
5. Smooth Muscles: Works automatically to control many
Actions inside your body. They are INVOLUNTARY.
They are NOT striated. They react slowly and tire slowly.
6. Cardiac Muscles: Muscles of the heart.
They are INVOLUNTARY, Striated, & Do not get tired
7. Muscle cells can only contract, not extend, skeletal muscles
must work in pairs. While one muscle contracts, the other
Returns to its original length.
8. Muscle Care:
*Exercise – maintain strength and flexibility
*Stretching – Before working out (Warm up)
Stretch after work out – (Cool Down)
*Use Safety Equipment
Examples: Pads on joints, back support, Helmets, Good Shoes
9. Muscle Injuries:
*Muscle Strain – Pulled muscle
*Tendon Strain or Tear
*Muscle Cramping