Cardio is heart, because you heart pumps blood to the organs, tissue, and cells of your body.
They wouldn't have high cholesterol.
Use this link:
https://www.khanacademy.org/math/algebra-home/alg-basic-eq-ineq/alg-old-school-equations/v/averages
Your kidney will release adrenaline (epinephrine) when your fight or flight response is activated or when your body is under stress.
