Which system is responsible for the transportation of blood throughout the system?

a. respiratory system

b. cirulatory system

c. digestive system

d. endocrine system

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.

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