Topics: Bones and Muscles Quiz
What is a muscle
A. A hard outer covering of the body
B. A skeleton without hard parts
C. Tissues that contract or relax to create movement
D. Large structures that are filled with fluids that help shape an animal
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What is a skeleton?
A. Tissues that contract to create movement
B. Tissues that relax to create movement
C. A framework that supports and protects an animal
D. Small tubes that help vertebrae support the spinal cord