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TOPIC: Locomotion Aim: Explain the structure and functions of the 3 types of muscles. Do Now: Explain the difference between a ligament and a tendon. HW: Castle Learning – Skeletal and Muscular System Identify the purple structures in the diagram. Explain their function. Babies are born without the patella (knee bone) it develops between ages 2 and 5. 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 • Locomotion the muscular • Move by contracting system (shortening) and relaxing Voluntary muscles • You are able to control –Examples: Arm & leg muscles Involuntary • You do not control Muscles consciously –Example: Heart and stomach muscles MUSCLES TYPES Smooth Muscle • Non-striated (no stripes) • Involuntary • Line your internal organs (digestive system, blood vessels…) Cardiac Muscle • ONLY in the HEART • Involuntary • Striated (have stripes) • Fibers branch Skeletal • Attached to bones Muscle • Voluntary • Striated • Work in pairs. – One contracts while the other relaxes How do muscle cells get energy? • Aerobic respiration (needs oxygen) Glucose Energy + + Water Oxygen + Carbon Dioxide http://www.brainpop.com/health/bodysystems/muscles/ Let’s summarize… 1. Identify the 3 types of muscles. 2. Describe where each type of muscle is located. 3. Describe whether each type of muscle is involuntary or involuntary. 4. Describe whether each type of muscle is striated or non-striated. 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 http://www.youtube.com/watch?v=8dRBe8JBVs&feature=related http://www.kidport.com/grade5/Science/BodyBon es.swf