THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -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-2: -The right atrium is the first chamber that receives blood. The chamber expands as its muscles relax to fill with blood that has returned from the body. The blood enters a second, more muscular, chamber called the right ventricle. The right ventricle is one of your heart’s 2 major pumps.

Detailed explanation-3: -The blood first enters the right atrium. The blood then flows through the tricuspid valve into the right ventricle. When the heart beats, the ventricle pushes blood through the pulmonic valve into the pulmonary artery. The pulmonary artery carries blood to the lungs where it “picks up” oxygen.

Detailed explanation-4: -A typical heart has two upper and two lower chambers. The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart.