Capillaries: Function Anatomy - Cleveland Clinic What are capillaries? Capillaries are delicate blood vessels (tubes that hold blood) throughout your body They bring nutrients and oxygen to cells in your organs and body systems In exchange, they also carry away tissue waste like carbon dioxide
Capillary - Wikipedia Capillaries are microvessels and the smallest blood vessels in the body They are composed of only the tunica intima (the innermost layer of an artery or vein), consisting of a thin wall of simple squamous endothelial cells
Capillary | Blood Vessels, Exchange Function | Britannica Capillary, in human physiology, any of the minute blood vessels that form networks throughout the bodily tissues; it is through the capillaries that oxygen, nutrients, and wastes are exchanged between the blood and the tissues
What Are Capillaries and What Is Their Function? Capillaries are the smallest and most abundant blood vessels in the circulatory system These microscopic vessels are the connection point between arteries, which carry blood away from the heart, and veins, which return blood to it
Capillaries: Overview and Practice Questions (2026) Capillaries are the smallest blood vessels in the body, forming a vast network that connects arterioles to venules Their walls are made of a single layer of endothelial cells, making them extremely thin and well-suited for the exchange of substances between blood and surrounding tissues