Muscles and Body Movement Objectives: 1. The student will define and apply the principles of body motion. 2. The student will define and discuss the three different types of muscle tissue. 3. The student will define and understand the difference between involuntary muscle and voluntary muscle. SOLs: 9.1, 9.1b, 9.1d, 9.1e, 9.1f, 9.1g: 9.2, 9.2a, 9.2c, 9.4, 9.4a, 9.4b

Book Assignment (pg. 380) What are the Ten guidelines I can follow to prevent physical activity – related injuries? What does RICE stand for: Describe each principle(pg.745) New book: pg. 35. Complete and turn in

Muscular System Your body has three basic types of muscle tissue: Smooth muscle Skeletal muscle Cardiac muscle

This is a special type of tissue that forms the wall of the heart. This muscle pumps blood through your cardiovascular system. Cardiac muscle is an involuntary muscle, meaning they work without a person’s conscious control.

Smooth muscle Smooth muscles are located in place such as the intestines and blood vessels. Smooth muscles are involuntary muscles.

Skeletal muscle Skeletal muscles are attached to your bones and cause body movement. Skeletal muscles are voluntary, meaning they are under conscious control. Skeletal muscles account for 40%-50% of your total body weight.

Flexion: This means bending or folding. Flexor muscles generally curl the body forward into the fetal position.

Extension: This means stretching out, the opposite of flexion. Extensor muscles stretch the body as in bending backwards with your arms over your head. Like waking up in the morning and stretching.

Abduction: This means drawing away In body terms, it is a movement to the side as in lifting your arm or leg away from your body when you step to the side or reach out to the side.

Adduction: This means drawing inward A sideways motion opposite to abduction as in bringing an arm or leg back towards the center of the body. If you were a soldier it would be the movement from "at ease" to "attention" bringing both legs together.

Rotation: This means turning around, like a wheel. It means movement around the axis of a bone like the movement of your head when you look from right to left or the movement of your hand and wrist when you use a screwdriver.

Basic Facts Flexors and extensors work in opposition. Abductors and adductors work in opposition. Rotation uses muscles that work in combination.

THE END!!