Oxygenated blood from the lungs enters the left atrium. The blood then moves from there to the left ventricle, aorta, and on the rest of the body.
blood oxygen
Oxygen-poor blood enters the heart through the right atrium
The blood enters through the superior and inferior vena cava.
The right atrium is where deoxygenated blood enters the heart.
Atrium
Blood returning from systemic circulation enters the heart at the right atrium. Blood from the pulmonary circulation enters the left atrium.
When blood leaves the lungs through the pulmonary veins, it returns to the heart and enters the left ventricle.
left ventricle Blood enters the left & right atria. Blood entering the left ventricle came from the left atrium. Blood from the body enters the right atrium. From there it is pumped to the right ventricle, through the lungs, to the left atrium, to the left ventricle, then throughout the body. Then back to the right atrium...
It comes from the 4 pulmonary veins that drain into the left atrium. they carry oxygenated blood that has come from the pulmonary circulation as well as the deoxygenated blood from the bronchial arteries.
Blood that comes in to the right atrium comes from the pulmonary vein.
Right atrium is where the blood enters through superior or inferior vena cava.
Depends on which atria you are asking about. Blood enters the right atrium from the vena cava and the left atrium from the pulmonary vein.