Question

Choose the correct answer from the alternatives given.
The walls of the left ventricle are relatively thick because:

• A. it contains oxygenated blood
• B. aorta arises from it
• C. it pumps blood to the entire body
• D. it is bigger than the right ventricle

Answer 1

The correct option is C it pumps blood to the entire body

The left ventricle pumps oxygenated blood around the entire body while the right ventricle only pumps blood to the lungs which is a much shorter distance. Because the left ventricle needs to pump the blood further it needs to generate more force during contraction in order to do this. This extra force is generated due to the additional muscle found in the left ventricle wall compared to the right ventricle wall.

Additionally, the blood being pumped to the lungs from the right ventricle needs to be at a lower pressure in order to prevent damage to the many thin capillaries the blood goes through in the lungs. This helps to explain why the wall of the right ventricle is thinner.

So, the correct option is 'It pumps blood to the entire body'.