What happens in an athlete's body, 20 seconds after he starts running a race?
1. The heart pumps more blood to the legs.
2. The muscles begin to tighten.
3. Fluids pour into the stomach.
4. The lungs need more air.​
Answers
Answered by
1
Answer:
the heart pumps more blood to the legs
Answered by
3
Answer:
the answer is 4
Explanation:
because when we are doing work then our body cells need oxygen to cellular respiration to produce energy
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