When you engage in heavy exercise, more often then not, your breathing rate and heart rate increase. Explain what purpose both increased breathing rate and heart
rate would serve in regard to cellular respiration.

Breathing rate increases to provide the body (exercising muscles) with oxygen at a higher rate. Heart rate increases to deliver the oxygen (and glucose) to the respiring muscles more efficiently. The heart, lungs and circulatory system working together make up the cardiovascular system.

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pesticide

d. organisms have cells with different shapes and functions.