The heart is the strong muscle which pumps blood throughout your body.
It is a hollow muscle, about the size and shape of a fist.
It is actually made up of two separate pumps.
It is called an involuntary muscle because it works without you ever having to think about it working.
The heart is located between the lungs and behind your rib cage.
The heart has four chambers in it (right atrium, left atrium, right ventricle, and left ventricle).
The muscular wall called the septum divides the two sides of the heart.
Blood can’t pass from one side to the other.
Abu Bakr Shalaby
Science For My Students