MICROANATOMY

Detailed explanation-1: -The heart receives deoxygenated blood from the body into the right atrium. This passes from to the right ventricle via the tricuspid valve. The pulmonary artery then carries the blood to the lungs for oxygenation.

Detailed explanation-2: -The tricuspid heart valve separates the right atrium from the right ventricle and allows deoxygenated blood to flow between them.

Detailed explanation-3: -So, the correct answer is ‘Pulmonary artery’.

Detailed explanation-4: -The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart. From there, the blood flows through the tricuspid valve (TV) into the right ventricle (RV), or the right lower chamber of the heart.

Detailed explanation-5: -The pulmonary heart valve separates the right ventricle from the pulmonary artery, which transports deoxygenated blood to the lungs. As deoxygenated blood leaves the right ventricle, it passes through the pulmonary heart valve, which has been closed as the right ventricle was filling.