Question

explain the heart and diagram

Answer 1

Blood is pumped from the right atrium down into the right ventricle and from the left atrium down into the left ventricle. In the second stage, the lower chambers contract to push this blood out of the heart to either the body via your main artery (aorta) or to the lungs to pick up oxygen.
Hope it helps

Answer 2

Hey friend

Heart is an organ which helps in transportation of oxygenated blood to body parts .
It consists of 4 chambers

1. left atrium
2. left ventricle
3.right atrium
4. right ventricle

arteries carry oxygenated blood and veins carry deoxygenated blood