1. Chapter 15-3: Muscular System
-the organ system whose primary function is movement and flexibility.
-to help you move, it is attached to bones.
-make up of all the body’s involuntary and voluntary muscles

2. Lever:
-a simple machine that consists of a bar that pivots at a fixed point called a fulcrum.

3. Extensor:
-muscle that straightens part of your body.
Flexor:
-muscle that bends part of your body.

4. Mechanical advantage:
A number (#) that tells you how many times (x) a machine multiplies (Xs) force.

5. Cardiac muscle:
-muscle that is found only in your heart.
Smooth muscle:
-muscle that can be found in the wall of blood vessels and in the digestive tract.

6. Tendinitis:
-tendon b/ms inflamed.
Strain:
-an injury in which a muscle is overstretched or torn

7. **During resistance exercise people work against weight (wt).
Aerobic Exercise:
-moderately intense activity that improves endurance.

8. Cardiovascular System:
-includes the blood vessels, blood, and heart.
Urinary System:
-takes waste out of the blood.

9. Ligaments: stretchy tissue that connects bones.
Differentiated cells:
Ex) muscle cells, neurons,
red blood cells, and epithelial cells, etc.

10. Digestive System:
-stomach,
-small intestine,
-colon