Q1. [1] straightforward initial-understanding
Why do arteries have thick, elastic walls?
(a) Because they carry deoxygenated blood.
(b) Because the blood in them is under high pressure from the heart.
(c) Because they have valves to prevent backflow.
(d) Because they are located deep inside the body.
- a Because they carry deoxygenated blood.
- b Because the blood in them is under high pressure from the heart.
- c Because they have valves to prevent backflow.
- d Because they are located deep inside the body.