None, the atria are chambers of the heart.
Right atrium and right ventricle
The right atrium which passes it to the right ventricle
The right atrium from the body and the left atrium from the lungs.
It's a chamber in the heart in which blood flows. It flows through the right atrium and into the right ventricle where it is then pumped into the lungs.
All veins lead to the right atrium of the heart. After the right atrium, blood goes into the right ventricle then the pulmonary arteries to the lungs. All venous emboli will eventually end up in the lungs.
deoxygenated blood from around the body is brought back to the heart through the vena cavae into the right atrium. now the right atrium pumps this blood into the right ventricle, which also pumps it to the lungs to be oxygenated. the oxygenated blood returns to the left atrium which pumps it into the left ventricle which then pumps it to the rest of the body and a whole new cycle is begun all over again.
Blood from the superior vena cava and inferior vena cava meet to flow into the right atrium, then to the right ventricle, in order to go into the lungs and refresh the oxygen in the blood .
Lungs, right atrium, right ventricle, capillaries.
both the lungs for purification
The right side of the heart receives blood from the body and pumps it to the lungs, then pumps it out into the body.
The heart is composed of four chambers - ONE of each: right atrium, RIGHT VENTRICLE, left atrium and left ventricle.
The left atrium of the heart receives oxygented blood from the pulmonary veins returning oxygenated blood to the heart.