Question

Differentiate between arteries and veins. what is the importance of capillaries in the circulatory system?

Answer 1

arteries:i) they are thick walled
ii) they carry blood from heart to other body parts
iii) they do not have valves in them

veins:i) they are thin walled
ii) they carry blood from body parts to the heart
iii) they have valves which regulates and stops the back flow of blood

Answer 2

The chief difference between arteries and veins is the job that they do. Arteries carry oxygenated blood away from the heart to the body, and veins carry oxygen-poor blood back from the body to the heart. ... Capillaries are tiny, thin blood vessels that allow oxygen and nutrients to flow to nearby tissue.