Your kidneys have to most direct effect on your circulatory system. Your heart pumps the blood into your kidneys and your kidneys keep your blood clean. without your kidneys, your blood would contain too much waste and water. without your heart, your kidneys wouldn't have the oxygen filled blood needed to do its job.
Glycogen is the process of storing excess glucose. During fight or flight, catabolism is the fore action of the body. Production of glucose for release of energy not conservation of energy.
