venulae
Venulae are small veins in the circulatory system. They are the smallest venous vessels, measuring about 10 to 100 micrometers in diameter. These microscopic vessels collect deoxygenated blood from capillaries and begin the process of returning it to larger veins and ultimately to the heart.
Venulae are crucial for regulating blood flow and pressure. Their thin walls allow for some degree of
There are two main types of venulae: postcapillary venules and muscular venules. Postcapillary venules are the