1. Warm Up Which cell organelle do muscles require a considerable amount?
What are the four types of bone?
What are the parts of the skeleton?
List the types of joints.

2. Muscular System
McDougall/Littel

3. Muscles Perform Important Functions
Every movement of your body
The beating of your heart
Movement of food down your throat
Blinking of your eyes
Some movements are under your control, and other movements seem to happen automatically
Keeping body temperature stable
Maintaining posture

4. Movement
The muscles that produce movement are made up of individual cells called muscle fibers.
These fibers contract and relax.
Most of the muscles involved in moving the body work in pairs.
As they contract, muscles shorten, pulling against bones.

5. Your Body Has Different Types of Muscle
Skeletal Muscle (voluntary)-muscles that are attached to your skeleton
Slow-twitch muscles (distance)
Fast-twitch (sprinters)
Smooth Muscle (involuntary) found inside some organs, such as the intestines and the stomach.
Cardiac Muscle (heart/involuntary)

6. Skeletal Muscles and Tendons Allow Bones to Move
Skeletal muscles are attached to your bones by strong tissues called tendons.
The tendons on the end of the muscle attach firmly to the bone.
As the fibers in a muscle contract, they shorten and pull the tendon.
The tendon, in turn, pulls the bone and makes it move.

7. Muscles Grow and Heal
During exercise, chemicals can build up in the muscles and make them cramp or ache.
The muscle soreness is caused by damage to the muscle fibers.
Such injuries take time to heal, because the body must remove injured cells, and new ones must form.

8. Describe the Following:
Functions
Structure
Movement
Development

9. Movement
Body Temperature
Posture

10. Skeletal Cardiac Smooth Type of Muscle Where is it found?
How do they work?
Skeletal
Cardiac
Smooth

11. Muscle
Location
Action When Contracted
Biceps
Triceps