Blood returning from the body systemic circulation first enters which chamber of the heart?
blood used by the body enters the right atrium
From the left ventricle.
atrium.
It enters the right chamber called right atrium
In the pulmonary circulation, deoxygenated blood leaves the right section of the heart through the pulmonary artery, enters the lungs and oxygenated blood comes through the pulmonary veins. The blood then moves to the left atrium of the heart.
Blood returns to the heart via the pulmonary veins and it enters into the left atra.
The medical term for the chamber of the heart that receives oxygenated blood from the lungs is the left atrium.
Are you using this instead of doing homework? Blood comes back into the heart from the lungs via the Pulmonary vein into the Left Atrium.
The left atrium
The right atrium is where the blood enters the heart.
Blood enters the right atria from the superior and inferior vena cava. Then it flows down into the right ventricle. Then to the lungs. Back to the left atria. Down into the left ventricle and out the the rest of the body.