There is an aorta and a ventricle on each side of the heart.
Right atrium gets the oxygen depleted blood from the body and pumps it to the right ventricle Right ventricle pumps it to the lungs. Left atrium gets the oxygenated blood from the lungs and pumps it...
left ventricle, right ventricle, right atrium, left atrium.
Birds have four chambered hearts is because, they need to get a lot of oxygen when flying which takes up a lot of energy
yes