give 5 functional and structural differences between arteries and veins
Answers
Arteries
1. They have thick and elastic walls to withstand the high pressure of the blood flowing through them.
2. Valves are absent.
3. Carries blood away from the heart and towards different parts of the body.
4. Transports oxygenated blood (with the exception of the pulmonary artery, which transports deoxygenated blood).
5. They are located deep within the body.
6. Red in colour, as they carry oxygenated blood.
Veins
1. Veins have a thinner walls (since no pressure is generated in the veins for the flow of blood).
2. Valves are present to prevent the back-flow of blood.
3. Carries blood from different parts of the body to the heart.
4.Transports deoxygenated blood (with the exception of the pulmonary vein, which transports oxygenated blood).
5. Present close to the skin
6. Blue in colour, as the carry deoxygenated blood.