Definition: This is used to carry oxygen and nutrients to the cells in the body and carry carbon dioxide and wastes away from the cells.

Blood

Explanation:

Blood is the liquid that circulates through blood vessels of humans and other vertebrate animals, carrying oxygen and nutrients to cells of the body and carbon dioxide and other wastes away from cells of the body. Oxygen is an essential gas for the production of ATP energy during cellular respiration, thus it must be delivered to all body cells. Carbon dioxide on the other hand is a waste gas produced during cellular respiration. Nutrients should be delivered to the cells, top ensure cellular respiration takes place which generates energy in the form of ATP to drive cellular processes.