Because that's exactly what it does !... The heart muscles contract in a pulsing action - pumping blood through arteries and smaller vessels around the body.
The heart.
the heart is our pumping organ
In biology, it's the heart.
In the body, the main pumping organ is the heart.
heart is the pumping organ of our body because if the heart is not pumping that makes you not alive and when it pumps that is the meaning that you are alive.
The Heart.
The heart is a four chambered muscular organ tasked with pumping blood round the body.
The whole heart is made of muscle to do the pumping
The pumping organ of the circulatory system is the heart. It generates the pressure to move blood through the circulation.
The heart.
The heart is responsible for pumping blood.
The heart. It pumps blood around the body.