The heart is an organ inside our body. When you exercise, run, jog or lift your legs up fast, you can hear and feel something beating inside your chest, Is your heart beating.
Every heartbeat is the sound of the heart pumping as it pushes the blood around the body. When the heart pumps oxygen-rich blood through the tiny tubes that lead it to every part of its body, this is blood circulating inside the body. This system is called the circulatory system.
When you run, jog or lift your legs up high, your heart beats faster because it needs to produce more oxygen. There are four main components-red blood cells, white blood cells, Liquid and plasma.
After the blood is pushed to all the parts of the body, It is then pushed back again (It takes less than a minute for blood to go all over the body).
Our heart is very important because it is what keeps us alive. We would die without it.
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