When the Heart Beats

All multicellular organisms have a specialized system to transport nutrients and other necessary materials to the cell and the wastes away from the cell. This system is known as circulatory system.

Circulatory system is the transportation system of human body. It has three major parts − Blood, Blood vessel, and Heart.

Blood- It is a fluid connective tissue that is pumped throughout the body by heart.

Functions of Bloo…