What is the difference between anaerobic respiration in animals compared to anaerobic respiration in plants, yeast, and bacteria?

Anaerobic yeast is an example of a facilitative anaerobe bacteria; individual human cells are also facilitative anaerobes: they switch to lactic acid fermentation if oxygen is not available. Anaerobic bacteria can survive without the presence of oxygen. Nearly all animals and humans are obligate aerobes that require oxygen for respiration.

The main difference between anaerobic respiration in animals and in plants, yeast, and bacteria is the end product. In animals, anaerobic respiration produces lactic acid, while in plants, yeast, and bacteria, it produces either ethanol and carbon dioxide (fermentation in yeast and some bacteria) or lactate (fermentation in some bacteria and plants).

The primary difference between anaerobic respiration in animals and in plants, yeast, and bacteria lies in the byproducts produced during the process. In animals, anaerobic respiration primarily produces lactic acid, whereas in plants, yeast, and bacteria, anaerobic respiration typically produces ethanol (in yeast and some bacteria) or lactate (in bacteria and some plants) along with carbon dioxide.