How does a chocolate biscuit get digested?

When you eat a chocolate biscuit, it begins its journey through your digestive system. Here's a step-by-step breakdown of what happens:

1. Mouth:

- As you chew the biscuit, your saliva breaks down some of the carbohydrates and fats in the biscuit.

- Saliva contains an enzyme called amylase that begins the process of breaking down starches.

2. Esophagus:

- After chewing, you swallow the biscuit, and it travels down your esophagus through rhythmic muscle contractions called peristalsis.

3. Stomach:

- Once in the stomach, the biscuit is mixed with gastric juices containing hydrochloric acid and enzymes such as pepsin and lipases.

- Hydrochloric acid kills any harmful bacteria that might be present.

- Pepsin begins to break down proteins, and lipases break down fats.

4. Small Intestine:

- The partially digested mixture, now called chyme, moves into the small intestine.

- The pancreas releases enzymes such as amylase, protease, and lipase into the small intestine.

- Amylase further breaks down starches into simple sugars (glucose).

- Proteases break down proteins into amino acids.

- Lipases break down fats into fatty acids and glycerol.

- The walls of the small intestine absorb the nutrients (glucose, amino acids, fatty acids) into the bloodstream.

5. Large Intestine (Colon):

- Undigested material and water pass into the large intestine.

- Bacteria in the colon ferment some of the remaining indigestible carbohydrates, producing gases (such as methane and hydrogen) and waste products.

- Water is absorbed from the remaining material, and feces are formed.

6. Elimination:

- The feces, which contain undigested remnants of the biscuit and other waste products, are eventually eliminated from the body through the rectum during a bowel movement.

This completes the process of digestion and absorption of the chocolate biscuit.