Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

A. The average person has about one to one and a half gallons of a liquid inside his or her body called blood.

B. The circulatory system is responsible for the movement of blood throughout the body through blood vessels.

C. Blood is the most essential and important part of the body's circulatory system.

D. The heart is the pump that makes it all happen