Blood vessles

Question 1

Arteries

Answer 1

Carry blood away from the heart to the organs. the blood is under high-pressure. They have thick muscular walls with elastic fibres and a small lumen.

Question 2

Capillaries

Answer 2

bring blood to the cells of the body, and then defuse the blood into the cells, and CO2 defuses from the cells to the blood. Very thin walls, one cell thick.

Question 3

Veins

Answer 3

Carry blood from the organs back to the heart. Blood is under low pressure, thinner walls, large lumen and have valves to prevent blood backflow.