Question

What do muscles need in order to expand and stretch?

A.) oxygen
B.) blood
C.) helium
D.) vitamins

Answer 1

Answer: A.) oxygen

Explanation: Muscles need oxygen to expand and stretch. What happens when a muscle gets exercised or worked out? The body needs more oxygen to keep the muscle going. The heart pumps more blood to the working muscle to get oxygen. This helps the muscles to expand and stretch properly.

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