The food contains a sugar called glucose, which is broken down in a process called cellular (respiration ). This process uses (oxygen) to break down food molecules and provide energy for cells.
Cellular respiration refers to the set of biochemical reactions take place in a cell in order to convert the energy of glucose into adenosine triphosphate (ATP).
The biochemical reactions involved are:
Glycolysis
Pyruvate decarboxylation
Krebs cycle
Electron transport chain
Oxidative phosphorylation
It consumes oxygen and releases ATP, water, and carbon dioxide (byproduct).
The correct order is glucose, respiration and oxygen.
When we eat food, it is in the form of glucose, this glucose is used by the body to obtain energy and this is done by the process of cellular respiration. This process uses oxygen for the breakdown of glucose.
As cellular respiration is generally a aerobic process, it requires oxygen for the breakdown of glucose.
