It can continue to respire anaerobically, but it does not get so much energy from the sugar. We can respire in both ways too. Normally we use oxygen, but when we are running in a race, we may not get enough oxygen into our blood, so our muscles start to respire anaerobically. Unlike yeast we produce lactic acid. Making lactic acid is not much better.
Lactic acid causes cramp.
You must memorise this word equation. Back to index Ventilating the Lung. This is the proper term for what many people call breathing. You must actually suck air into your lungs. Sucking air into the lungs is called inhaling .