Have you ever heard of cellular respiration? It occurs in every single heteroph (consumer)in the world!
Cellular respiration happens in the mitochondria of a cell . the reason the mitochondria is called the power house of the cell is because when cellular respiration occurs, it produces energy in the form of ATP.
When the reactants of oxygen and glucose come together to create the products carbon dioxide, water and ATP, they go through the process of the electron transport chain.
Everything we do in life takes energy, so cellular respiration is very important to all consumers.
Oxygen is one of the most vital reactants in cellular respiration.
Cellular respiration couldn't happen without it, which is why we call in an aerobic function.