ANATOMY

Detailed explanation-1: -Blood is pumped through your heart and lungs in four steps: The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve. The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve.

Detailed explanation-2: -Right atrium: one of the four chambers of the heart. The right atrium receives blood low in oxygen from the body and then empties the blood into the right ventricle.

Detailed explanation-3: -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-4: -The right atrium receives oxygen-poor blood from the body through the superior vena cava and the inferior vena cava and pumps the blood to the right ventricle. The tricuspid valve allows oxygen-poor blood to flow forward from the right atrium to the right ventricle.

Detailed explanation-5: -The right atrium receives blood from the body. This blood is low in oxygen. This is the blood from the veins. The right ventricle pumps the blood from the right atrium into the lungs to pick up oxygen and remove carbon dioxide.