Question

In animal tissues, ATP is stored primarily in the form of

Answer 1

these are the main source those provide ATP so you can say them as storing point
(1) creatine phosphate, (2) glycogen, and (3) cellular respiration in the mitochondria of the fibers.

Answer 2

GLycogen is the primary form of stored energy. Readily accessible from the Liver it can be quickly delivered to muscles and your brain through the blood stream. Once it arrives it is broken down into glucose monomers and enters glycolysis and TCA. Once electrons from the sugar are shuttled through the ETC, the ATPase enzyme can produce new Adenosine triphosphates by bonding single phosphates (\[PO _{4}H's\] to the ADP's.