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What causes SMALLER humans/animals to have a FASTER heartbeat, and LARGER ones to have a SLOWER heartbeat?

Sagot :

Answer:

Small animals, such as mice, have more active mitochondria in their bodies, working at a faster pace to produce energy and heat. This also translates into a faster heartbeat and breathing rate. Large animals like elephants have a slower metabolism and more chilled out mitochondria, producing just enough heat to live.

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