Definition
A capillary vein isn't a standard term, but it likely refers to a venule, which is a small vein that receives blood from capillaries. If capillaries are tiny streams, then a capillary vein/venule is the little creek that collects them. These vessels gather deoxygenated blood and transport it toward larger veins. Think of them as the transition point between the smallest vessels and larger veins. They are the starting point of the venous system. It's all about collecting and moving fluids ➡️.