What term refers to the tiny blood vessels that allow the transfer of oxygen, carbon dioxide, nutrients, and waste?

Capillary vessels are the tiny blood vessels that play a crucial role in the circulatory system by facilitating the exchange of oxygen, carbon dioxide, nutrients, and waste products between the blood and surrounding tissues. They are characterized by their thin walls, which consist of a single layer of endothelial cells. This structure allows for easy diffusion of gases and molecules, enabling the body to maintain homeostasis.

The function of capillaries is essential for providing cells with the oxygen they need for metabolic processes and for removing metabolic waste, which is vital for overall health. Capillaries connect the arterial system (arterioles) with the venous system (venules), creating a network that ensures efficient exchange throughout the body.

By understanding the unique role of capillary vessels, one can appreciate their significance in the circulatory system compared to other types of blood vessels like arterioles, venules, and veins, which serve different functions related to blood flow and transport.