endothelium

The endothelium is a thin layer of cells that lines the inside of all blood vessels in your body, from small capillaries to large arteries. It acts as a barrier between the blood and the vessel walls, regulating the flow of nutrients, hormones, and waste products. The endothelium also helps control blood pressure, prevents blood clots, and keeps blood vessels flexible and healthy. It plays a vital role in maintaining overall cardiovascular health by responding to changes in blood flow and tissue needs, making it essential for proper circulation and anatomy.