____ is a process that occurs inside cells that allows the ____ stored in food to be converted into ____ energy that the cells can use. An animal must eat food and breathe in ____ in order for cellular respiration to occur. When an animal eats, its ____ system immediately gets to work by breaking down food into smaller molecules, such as glucose. The ____ system carries glucose and oxygen gas to the cells that make up the animal's body. Inside the cytoplasm of the cell the ____ breaks down further and then enters a ____ (a powerhouse of the cell) where it reacts with oxygen and releases the ATP energy the cell needs.

Cellular Respiration

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