Veins are _________________ walled blood vessels that carry _________________ blood towards the heart.
A blood vessel which carries blood back to the heart is : (a) artery (b) vein (c) capillary (d) platelet
The blood vessel which carries oxygenated blood from the lungs to the heart is : (a) main artery (b) pulmonary artery (c) main vein (d) pulmonary vein
Name the following:
(a) A blood vessel that carries deoxygenated blood away from the heart.
Which blood vessel- a vein or an artery connected to a ductless gland carries hormones?