oxygen i think
Respiration produces energy in the form of ATP that living things need to survive.
During cellular respiration, two things given off are carbon dioxide and water. These byproducts are released as a result of the breakdown of glucose and other molecules to produce energy.
no respiration
Respiration.
air
Foot and oxygen
mitochondria
Glucose and oxygen
respiration
to get ENERGY: cellular respiration
In the process of respiration OXYGEN is taken in from the atmoshpere and CO2 is released.