WARMUP # 1

• Explain how you think your muscles help

you to move.

•  • S7L2.e: Explain the purpose of the major

organ systems in the human body (i.e., digestion, respiration, reproduction, circulation, excretion, movement, control, and coordination, and for protection from disease).

Muscular System pg. 588

• I. Kinds of Muscles• A. Three Major Muscles• 1. What are the 3 kinds of muscles

and where are they located?• 2. Distinguish between voluntary and

involuntary muscle movement.• 3. Explain how the muscles in your

arm work.• 4. Describe how skeletal muscles

work.• 5. Describe how muscles work in pairs.

CRITICAL THINKING ACTIVITIES• I. Identify the problem.• CT 1: How do muscles work?• CT 2: What are bones made of?• II. What materials did you use? • CT 1:Index card, rubber band, straw, tape, muscle

diagram CT 2: bone in vinegar, knife and worksheet • III. Make a hypothesis.• _______________________________________________• IV. What is the procedure?• CT 1: Tape straw to muscle diagram and add rubber

band.• CT 2: Cut bone with a knife and describe what you see.• V. What were the conclusions?