👉 Percirculation, in the context of medicine and physiology, refers to the exchange or circulation of substances between the body's tissues and blood vessels. This process is essential for maintaining homeostasis and regulating bodily functions such as heart function, nerve transmission, and metabolism. In a healthy body, the circulatory system ensures that nutrients, oxygen, and waste products are transported through the bloodstream without being absorbed into the cells themselves. The circulation of substances in the blood helps to maintain the body's internal