Oxygen is Added to Blood as It Flows Through the ________

Question

Oxygen is added to blood as it flows through the ________ circuit.
A) pulmonary
B) systemic
C) oxygen
D) portal
E) primary

Accepted Answer

Oxygen is added to blood as it flows through the pulmonary circuit in the lungs, where it diffuses across the alveolar membrane and into the pulmonary capillaries. The systemic circuit is responsible for delivering oxygenated blood to the body tissues, while the oxygen circuit and portal circuit are not involved in the exchange of oxygen with the blood. The primary circuit is not a commonly recognized term in biology.