The ________ Circuit Carries Blood to and from the Lungs

Question

The ________ circuit carries blood to and from the lungs.
A) pulmonary
B) systemic
C) oxygen
D) portal
E) primary

Accepted Answer

The pulmonary circuit is the circuit responsible for carrying deoxygenated blood from the heart to the lungs, where it receives oxygen and returns back to the heart to be pumped to the rest of the body through the systemic circuit. Option B is incorrect because the systemic circuit is responsible for carrying oxygenated blood to the rest of the body. Option C is incorrect because oxygen is not a circuit, but rather a gas that is transported through the blood. Option D is incorrect because the portal circuit carries blood from one set of capillaries to another set of capillaries within the liver; it does not involve the lungs. Option E is incorrect because there is no such thing as a primary circuit.