The heart and blood · हृदय और रक्त
A free Biology lesson for Class 5 children.
The heart is a muscle about the size of your fist.
It pumps blood to every part of the body.
The heart has four chambers: two atria on top and two ventricles below.
The right side sends blood to the lungs to pick up oxygen.
The left side pumps this oxygen-rich blood to the whole body.
Arteries carry blood away from the heart. Veins bring it back.
You can feel your heart beating as a pulse at your wrist.