The main difference between artery and vein is?
Differentiate between each of the following pairs with reference to the aspect asked within brackets: (a) Erythrocytes and leucocyte (function) (b) Artery and vein (direction of blood flow) (c) Artery and vein (the type of blood primarily flowing through) (d) Tricuspid and bicuspid valves (location).
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
Why are valves absent in arteries and present in veins?