The muscular system

The muscular system

1. The muscular system Unit 1: Physical Education

2. Functions Muscles are responsible for the following: Movement Posture Production of body heat

3. Movement Voluntary: Under our control. Responsible for moving bones. Controlled by CNS. Muscles pull bones to create movement. Involuntary: Muscles linked to internal organs such as intestines and lungs.

4. Posture Muscles are continually in a state of ‘tone’. They help our body maintain upright posture. People with poor muscle tone generally have poor posture. When muscles become unbalanced overtime postural problems may occur. Regular exercise help improve muscle tone.

5. Production of body heat Energy is required to make muscles move. This reaction produces heat. Muscles play a vital role in homeostasis.

6. Types of muscle There are three types of muscle tissue in the human body Skeletal Smooth Cardiac

7. Skeletal muscles Attached to bones Under conscious control – Voluntary Some skeletal muscles such as eyelid and diaphragm are both voluntary and involuntary. All skeletal muscles have a striated or striped appearance.

8. Smooth Muscles Found internally in blood vessels and walls of intestine and stomach. Involuntary Help with the process of moving food through the digestive system.

9. Cardiac Muscle Makes up walls of the heart. Involuntary Striped appearance

10. Skeletal Muscles