To stay alive, cells need: 1.Food 2.Energy 3.To get rid of waste 4.To reproduce
Respiration produces energy for cells. ALL organisms, including animals and plants, break down sugar into carbon dioxide and water. Chemical Equation for Respiration: C 6 H 12 O 6 + O2 O2 H 2 O + CO 2
The cell uses the energy made by respiration to build, repair, and reproduce cells. Respiration occurs in the mitochondria.
When cells do not have enough oxygen to do respiration, they use fermentation to make energy. Fermentation breaks down sugar without oxygen and makes lactic acid as a waste product. Lactic acid is what makes your muscles burn when you work out really hard.