How is a human heart a hydraulic system?

The human heart functions as a hydraulic system by using pressure to move blood throughout the body. When the heart contracts (systole), it generates pressure that propels blood into the arteries, much like a pump in a hydraulic system. The heart's chambers fill with blood during relaxation (diastole), creating a pressure differential that facilitates blood flow. This cyclical process of contraction and relaxation effectively distributes oxygen and nutrients to tissues, similar to how hydraulic systems transmit force through fluid movement.