The role of ATP is to provide energy for the cell to perform its function. Its made from cellular respiration. Muscles need a lot of ATP because they're always contracting and relaxing and they do happen to use more ATP than other body parts. However, if a cell has no ATP, its not able to perform specific tasks. It always has ATP on hand, but is not always used. The second part of the hypothesis is wrong!
<h2>Answer:</h2><h2><em>The circulatory system transports blood around the body. The vascular system has two parts. Xylem transports water and minerals up, and phloem transports sugar down and to all the cells of the plant.</em></h2><h2><em></em></h2>
