This is a working model of the human heart. The heart is a muscular organ in our body.
It pumps blood to all parts of the body. The human heart has four chambers.
The upper two chambers are called atria.The lower two chambers are called ventricles.
The right side of the heart receives deoxygenated blood.
This blood is pumped to the lungs through the pulmonary artery.
In the lungs, blood receives oxygen and releases carbon dioxide.
Oxygen-rich blood returns to the left atrium through the pulmonary veins.
The left ventricle pumps oxygen-rich blood to the whole body through the aorta.
Valves prevent blood from flowing backward.
In this model, tubes represent blood vessels.
When we operate the model, the movement of water represents blood circulation.
This model helps us understand how the heart pumps blood continuously to keep us alive.