Glucose is stored in within the cell.

Liver glycogen stores serve as a store of glucose for use throughout the body, particularly the central nervous system. The human brain consumes approximately 60% of blood glucose in fasted, sedentary individuals. Glycogen is the analogue of starch, a glucose polymer that functions as energy storage in plants.

we would need to see the picture to answer it

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.