Question

What chambers of the heart does blood enter? From which does it exit the heart? 

Answer 1

blood is enter through left upper chamber and exit to other parts of the body by right upper chamber

Answer 2

Pulmonary vein carries oxygen rich blood from lungs to the left Atrium the upper left Chamber of the heart this blood is sent to left ventricle from here it is pump to the whole body through aorta(an artery)