What acids and alkalis are in animals?

In animals, various acids and alkalis play crucial roles in physiological processes. Hydrochloric acid (HCl) is found in the stomach, aiding in digestion, while lactic acid is produced during anaerobic respiration in muscles. Bicarbonate ions act as an alkali, helping to regulate pH levels in the blood and other bodily fluids. Additionally, fatty acids are important components of lipids, serving as energy sources and structural elements in cells.