HomeWhy do we need oxygen?How does cellular respiration take place?

How does cellular respiration take place?
    Cells have many different tasks. For example, they divide, grow and keep the body temperature at 37°C. They need energy to complete these tasks.
    Cells break down the food we eat into simpler molecules, like sugar, to get energy. In humans (and most other living beings), cells use oxygen to break down sugar (glucose). Oxygen is used, and carbon dioxide is produced as a waste product. Therefore, we need to bring oxygen into the body and remove carbon dioxide from the body.

Other Related Needs
Need for sugar
Need for transporting oxygen and sugar