does cellular respiration take place?
have many different tasks. For example, they divide, grow and keep
the body temperature at 37°C. They need energy to complete these
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.
Need for sugar
for transporting oxygen and sugar