The process of digestion in humans is completed in the small intestine (option b). Here's a step-by-step breakdown of the process:

1. Ingestion: The process begins in the mouth where food is ingested and chewed. Saliva, which contains enzymes, begins the process of breaking down food.

2. Esophagus: The chewed food (now called a bolus) travels down the esophagus to the stomach through a process called peristalsis.

3. Stomach: In the stomach, the food is mixed with stomach acid and digestive enzymes to break it down further into a substance called chyme.

4. Small Intestine: The chyme then enters the small intestine, where most of the digestion and absorption of nutrients occurs. The walls of the small intestine are lined with tiny finger-like projections called villi which increase the surface area for absorption.

5. Large Intestine: Any undigested food or waste products then move into the large intestine. Here, water and electrolytes are absorbed and the remaining waste is formed into feces.

6. Rectum and Anus: The feces are stored in the rectum until they are eliminated from the body through the anus.

So, while parts of digestion occur in the esophagus, stomach, and large intestine, the process is completed in the small intestine where nutrients from the food are absorbed into the bloodstream.

Question

The process of digestion in humans is completed in the small intestine (option b). Here's a step-by-step breakdown of the process:

1. Ingestion: The process begins in the mouth where food is ingested and chewed. Saliva, which contains enzymes, begins the process of breaking down food.

2. Esophagus: The chewed food (now called a bolus) travels down the esophagus to the stomach through a process called peristalsis.

3. Stomach: In the stomach, the food is mixed with stomach acid and digestive enzymes to break it down further into a substance called chyme.

4. Small Intestine: The chyme then enters the small intestine, where most of the digestion and absorption of nutrients occurs. The walls of the small intestine are lined with tiny finger-like projections called villi which increase the surface area for absorption.

5. Large Intestine: Any undigested food or waste products then move into the large intestine. Here, water and electrolytes are absorbed and the remaining waste is formed into feces.

6. Rectum and Anus: The feces are stored in the rectum until they are eliminated from the body through the anus.

So, while parts of digestion occur in the esophagus, stomach, and large intestine, the process is completed in the small intestine where nutrients from the food are absorbed into the bloodstream.

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