Question

Arteries carry blood at high pressure, while veins carry blood at low pressure.

Explain how their structures are related to these functions.
TIP
Start by making a list of bullet points of all the relevant information you can think of. Then
organise your points into a logical sequence. Write your final answer in full sentences.

Answer 1

Arteries have thick walls and small lumens to withstand the high pressure of blood being pumped from the heart. Veins, on the other hand, have thinner walls and larger lumens to accommodate the lower pressure blood being returned to the heart. These structural differences help each type of vessel carry out its specific role in the circulatory system and maintain proper blood flow and pressure.