From which chamber does the pulmonary artery originate?

From which chamber does the pulmonary artery originate?

• A. Right ventricle
• B. Left atrium
• C. Right atrium
• D. Left ventricle

Answer: (A)

Blood destined for the lungs comes from the right ventricle. When the right ventricle contracts, blood is ejected into the pulmonary trunk, which splits into the left and right pulmonary arteries that carry deoxygenated blood to the lungs for gas exchange. The other chambers have opposite roles: the left ventricle sends oxygenated blood into the aorta for systemic circulation, the left atrium receives oxygenated blood from the lungs via the pulmonary veins, and the right atrium collects deoxygenated blood from the body via the venae cavae and the coronary sinus. A useful memory cue is that the right heart handles the pulmonary circulation, so the chamber connected to the pulmonary artery is the right ventricle.

Blood destined for the lungs comes from the right ventricle. When the right ventricle contracts, blood is ejected into the pulmonary trunk, which splits into the left and right pulmonary arteries that carry deoxygenated blood to the lungs for gas exchange. The other chambers have opposite roles: the left ventricle sends oxygenated blood into the aorta for systemic circulation, the left atrium receives oxygenated blood from the lungs via the pulmonary veins, and the right atrium collects deoxygenated blood from the body via the venae cavae and the coronary sinus. A useful memory cue is that the right heart handles the pulmonary circulation, so the chamber connected to the pulmonary artery is the right ventricle.