TOPIC: Locomotion Aim: Explain the structure and functions of the 3 types of muscles. Do Now: Explain what makes up a joint.

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TOPIC: Locomotion Aim: Explain the structure and functions of the 3 types of muscles. Do Now: Explain what makes up a joint. HW: Ditto – Skeletal System Matching Column

Did you know……………. You have over 30 facial muscles which create looks like surprise, happiness, sadness, and frowning. Eye muscles are the busiest muscles in the body. Scientists estimate they may move more than 100,000 times a day! The largest muscle in the body is the gluteus maximus muscle in the buttocks.

Function of the muscular system Locomotion Move by contracting (shortening) and relaxing

Difference between voluntary and involuntary muscles Voluntary muscles: you are able to control

–Examples: Arm & leg muscles

Involuntary muscles: you do not control consciously (w/o thinking about it)

–Example: Muscles that make up your stomach & heart

3 TYPES OF MUSCLES

Non-striated (no stripes) Involuntary Smooth Muscle

Line your internal organs (digestive system, blood vessels…)

Cardiac Muscle ONLY in the HEART Involuntary

Striated (have stripes) Fibers branch

Skeletal Muscle Attached to bones Voluntary

Striated

Work in pairs. –One contracts while the other relaxes

How do muscle cells get energy? Aerobic respiration (needs oxygen)

Glucose + Energy Oxygen Carbon Dioxide Water + +

Review: Identify the muscle being described. 1.Involuntary 2.Striated 3.Found in the heart 4.Lines internal organs 5.Voluntary 6.Branched fibers 7.Attached to bones