Answer:
Blood flow!
Explanation:
Blood flow is the volume of blood flowing through any given vessel, or through the circulatory system as a whole, per minute. This is also called cardiac output, and it's determined by the blood volume pumped during one beat and the number of beats per minute.
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Many living organisms respond to things in the environment called Stimuli.
Answer:
A population is the number of living people that live together in the same place. A city's population is the number of people living in that city. These people are called inhabitants or residents. ... Usually population refers to the number of humans in a certain area.
Explanation:
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They both help the envirment