ANATOMY

Detailed explanation-1: -Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.

Detailed explanation-2: -The pulmonary veins are the veins that transfer oxygenated blood from the lungs to the heart.

Detailed explanation-3: -Your pulmonary veins collect oxygen-rich blood from your lungs and carry it to your heart. From there, your heart sends the blood to all your other organs and tissues.

Detailed explanation-4: -The pulmonary arteries and the pulmonary veins are the vessels of the pulmonary circulation; which means they are responsible for carrying the oxygenated blood to the heart from the lungs and carrying the deoxygenated blood from the heart to the lungs.

Detailed explanation-5: -Veins always return blood to the heart, but the pulmonary veins are bringing oxygenated blood back to the heart so that it may be pumped to the body’s tissues. Deoxygenated blood travels through the right ventricle to the pulmonary arteries.