Jose and Sarah are running in the cross country meet. Their skeletal and muscular systems work to move them through the course.
As they run, they breathe faster and harder and their heart rate increases. This illustrates that body systems
2 answers:
There muscles will keep moving and keep tiring till when they rest it increases there level
The Answer is A) Work Together
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A. Potentially hazardous is the correct answer.
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The brain is part of The Nervous System.
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