venules
Venules are small blood vessels that collect blood from capillaries and transport it to larger veins. They play a crucial role in the circulatory system by helping to return deoxygenated blood back to the heart. Venules have thin walls, allowing for the exchange of nutrients and waste products between blood and surrounding tissues.
These vessels are part of the microcirculation system, which includes capillaries and arterioles. Venules can vary in size and are often grouped together to form larger veins. Their structure is essential for maintaining proper blood flow and pressure within the vascular system.