BI-1133
Arteries, veins and capillaries
Biology · Secondary 3 · Medium · Arteries, veins and capillaries
Which statement correctly describes why capillaries are well suited for exchange of substances between blood and tissues?
- They have walls one cell thick and a narrow lumen
- They have thick, elastic walls to withstand high pressure
- They contain many valves to prevent backflow
- They have the widest lumen of all blood vessels
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.