1. Muscular System Learning Targets:
I can describe parts of the muscular system and explain how they work together
I can name the three kinds of muscle tissue
I can list and explain some disorders that affect the muscular system

2. Muscles
Muscle is one of our 4 tissue types and muscle tissue combines with nerves, blood vessels, and various connective tissues to perform movement.
The human body has more than 600 muscles.

3. Movement Muscle Functions Movement of body parts
Movement of blood through the heart
Movement of food
Movement of the air in and out of the lungs

4. Muscle Functions Body Temperature
Generation of heat. Occurs by shivering – an involuntary contraction of skeletal muscle.

5. Muscle Functions 3. Stabilization of joints
Muscles keep the tendons that cross the joint nice and tight.

6. How Muscles Work Skeletal muscles work in pairs to move your bones.
They contract, or shorten and they extend, or lengthen.
To bend the arm, muscles in the top part of the arm—especially the biceps brachii—contract, or shorten, pulling the bone of the forearm upward. At the same time, the triceps brachii—on the opposite side of the arm—must relax and extend, or lengthen.
Biceps brachii
Triceps brachii
Biceps brachii
Triceps brachii
To straighten the arm again, the biceps brachii relax. The triceps brachii now contract, pulling the arm into a straight line.

7. 3 Types of Muscle Tissue

8. 3 Types of Muscle Tissue
Muscle tissue responds to messages from the brain and contracts, or shortens, to cause movement.
Involuntary muscles move without your being aware of them. There are two types:
Smooth muscles, which include the muscles of internal organs and blood vessels (ex. Diaphragm, stomach, arteries, throat, eyes)
Cardiac muscles, found only in the heart
Blink eyes and hold breath
Voluntary muscles are under your control.
- Skeletal muscles are voluntary or under your control. (ex. Face muscles, tendons, biceps, triceps)

9. Skeletal Muscle Attached to bones by the tendons
Work with the bones of the skeleton to allow you to move.

10. Skeletal Muscle You control skeletal muscles.
Skeletal muscles make up about 40 percent of your body weight.

11. Skeletal Muscle

12. Smooth Muscle
Found in various organs in the body, such as the stomach and intestines.
You do not control these muscles. For example, once you have swallowed your food, smooth muscles move it through the digestive system.

13. Smooth Muscle Smooth Muscle can be found in many body systems:
Integumentary system
Respiratory system
Urinary system
Digestive system
Reproductive system

14. Smooth Muscle

15. Cardiac Muscle
Special type of muscle that is found only in the walls of the heart.
Controlled by your brain, cardiac muscle constantly contracts and relaxes, causing your heart to pump blood
Involuntary muscle