Question

State difference between the blood vessels artery, vein and capillary.

Answer 1

ARTERIES	VEINS	CAPILLARIES
1) These blood vessels have thick walls and carry blood from the heart to different body parts.	1) These blood vessels have thin walls and carry blood from different body parts to the heart.	1) These blood vessels are narrow and have very thin walls, they connect arteries and veins.
2) They do not have valves.	2) They have valves and prevent backflow of blood.	2) They do not have valves.
3) All the arteries carry oxygenated blood except the pulmonary artery.	3) All the veins carry deoxygenated blood except the pulmonary vein.	3) As it connects arteries and veins, therefore, it contains both oxygenated and deoxygenated blood.