Question

Are capillaries joined to veins? If yes then why?

Answer 1

Arteries (largest to smallest) connect to arterioles (smallest) which end in capillaries at the level of the tissue where there is oxygen exchange and nutrient movement into tissues and removal of byproducts of metabolism. Once the blood gets out of the capillaries, it enters the smallest veins (venules) to bigger veins and so on to the vena cava and right atrium, ventricle, lung, etc. Vein removal has NO effect on capillary or arterial physiology as there are redundant veins that can accomodate the egress of blood