Sagot :
Atria or Atrium are chambers of heart that recieves the blood from the vien , while ventricles are chambers of heart that is responsible to pump the blood.
atria are the receiving chambers of the heart, these receives blood from inferior and superior vena cavae for the right atrium and from the left and right pulmonary veins for the left atrium, while ventricle are the ejecting chambers, the right ventricle pumps blood to the pulmonary veins while the left ventricle pumps blood to the aorta