To adjust blood pressure independently in the capillaries of the gas-exchange surface and in the capillaries of the general body circulation, an organism would need a(n)
A) open circulatory system.
B) hemocoel.
C) lymphatic system.
D) two-chambered heart.
E) four-chambered heart.

Question

Quizplus · Accepted Answer

An organism with a four-chambered heart would be able to adjust blood pressure independently in the capillaries of the gas-exchange surface and in the capillaries of the general body circulation. The left side of the heart pumps oxygenated blood to the body, while the right side pumps deoxygenated blood to the lungs. This allows for separate regulation of blood pressure in the two different circulatory systems.

To Adjust Blood Pressure Independently in the Capillaries of the Gas-Exchange