Biology, 01.05.2021 16:40 jordynnmarelich9519
As a runner begins to run a race, his or her respiration rate will increase. The runner begins to breathe deeper and at a rapid rate. In addition, the heart beats more quickly. This will result in more oxygen and nutrients delivered to the muscle cells. Which three body systems are working together to help out the muscle cells?
Answers: 3
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As a runner begins to run a race, his or her respiration rate will increase. The runner begins to br...
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