Circulatory Structure
The circulatory system consists of the heart, blood vessels, and blood working together to transport nutrients, oxygen, and waste throughout the body. The heart functions as a four-chambered pump, with the right side handling deoxygenated blood and the left side managing oxygenated blood. Arteries carry blood away from the heart, while veins return it, with capillaries connecting the two for substance exchange.
Blood Components
Blood contains several key components red blood cells carry oxygen, white blood cells fight infection, platelets assist in clotting, and plasma transports nutrients and waste products. Each component serves specific functions essential for maintaining body health. The composition of blood adjusts to meet changing body needs through bone marrow production and regulatory mechanisms.
Flow Regulation
Blood flow regulation occurs through multiple mechanisms. Blood vessels constrict or dilate to control local blood flow, while heart rate and force adjust to meet systemic demands. The nervous system and hormones coordinate these responses. Understanding circulation helps treat cardiovascular diseases and maintain optimal blood flow throughout the body. Shutdown123