ANATOMY

Detailed explanation-1: -Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.

Detailed explanation-2: -Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.

Detailed explanation-3: -Deoxygenated blood from the lower half of the body enters the heart from the inferior vena cava while deoxygenated blood from the upper body is delivered to the heart via the superior vena cava. Both the superior vena cava and inferior vena cava empty blood into the right atrium.

Detailed explanation-4: -Right chamber of the human heart comprising of the right atrium and right ventricle receives deoxygenated blood from all the parts of the body.

Detailed explanation-5: -Left atrium: Your left atrium sends this oxygen-rich blood to your heart’s bottom left chamber (left ventricle). Left ventricle: Your left ventricle pumps the oxygen-rich blood through your aortic valve and into your aorta.