By the process of diffusion.
An arteriole transports oxygenated blood from the arteries to the capillary beds and a venule transports de-oxygenated blood from the capillary beds to the veins.
Artery -> Arteriole -> Capillary -> Venule -> Vein
venule(veins)
Blood leaves a capillary through a venule, a small vein. At that point, the blood is making its journey back towards the heart.
Microcirculation
Either a arteriole on the artery side or a venule on the vein side of the bed.
atrium, ventricle, artery, arteriole, capillary, venule, vein
It's called blood vessel. it can be of following type viz Artery, Vein, Arteriole, Venule, Capillary.
Capillaries send blood to both arteries and veins.
artery- vein- capillary
artery- vein- capillary
The blood vessels in between arteries and veins are the capillaries. But, they do not link them together, rather, they both have openings, through their capillaries, into the interstitial space which is the space between the cells of the tissues of the body.