Humans have what type of circulatory system? a) double loop b) single loop c) triple loop d) quadruple loop

How is the structure of our circulatory system and respiratory system related to the function of both these systems?

Which can be an effective way to reduce stress? a) getting in the habit of doing things perfectly the first time b) engaging in a fun physical activity on a regular basis c)taking an antacid for a stress-based stomachache d)studying extra hard the night before a test

What does fi stand for in the fitt-vp principle of exercise prescription?