What are the 3 kinds of gastric juices?

The three main components of gastric juice that aid in digestion are:

1. Hydrochloric Acid (HCl): Hydrochloric acid is the main component of gastric juice. It is produced by the parietal cells in the stomach and is responsible for the acidic pH of the stomach. This acidic environment is necessary for the activation of pepsin, an enzyme that helps break down proteins. Additionally, it creates an inhospitable environment for many bacteria and other microorganisms, contributing to the stomach's role as a defense barrier.

2. Pepsin: Pepsin is a digestive enzyme produced by the chief cells in the stomach. It is most active in acidic conditions and plays a crucial role in breaking down proteins into smaller peptides. Pepsin is secreted as an inactive form known as pepsinogen, which is then activated by the acidic environment in the stomach.

3. Mucus: Gastric mucus is a thick, protective layer that coats the inner lining of the stomach and protects it from the highly acidic environment. It is produced by the epithelial cells and mucous glands in the stomach. Mucus contains various components like mucins, water, electrolytes, and enzymes. It helps to lubricate the stomach, prevents mechanical damage from food, and protects the stomach lining from hydrochloric acid.