Which of the following is the correct chronological order for flow of food from mouth to anus ?

Options

A. Oesophagus `to` Stomach `to` Small intestine `to` Large intestine
B. Large intestine `to` Oesophagus `to` Stomach `to` Small intestine
C. Small intestine `to` Large intestine `to` Oesophagus `to` Stomach
D. Stomach `to` Small intestine `to` Large intestine `to` Oesophagus

Answer

To determine the correct chronological order for the flow of food from the mouth to the anus, we need to understand the sequence of organs involved in the digestive process. Here’s the step-by-step breakdown:

### Step-by-Step Solution:

1. **Mouth**: The process begins in the mouth, where food is ingested and partially digested with the help of saliva from the salivary glands.

2. **Oesophagus**: After the mouth, the food travels down the oesophagus. This is a long, muscular tube that connects the mouth to the stomach.

3. **Stomach**: Once the food reaches the stomach, it enters a muscular organ where further digestion occurs. The stomach has three regions: cardiac, fundic, and pyloric. The pyloric region is where the food is prepared to move into the small intestine.

4. **Small Intestine**: The food then passes into the small intestine, which is the longest part of the alimentary canal. The small intestine consists of three parts: duodenum, jejunum, and ileum. Nutrient absorption primarily occurs here.

5. **Large Intestine**: After the small intestine, the remaining undigested food enters the large intestine. The large intestine consists of several parts, including the cecum, colon (which has ascending, transverse, descending, and sigmoid regions), and rectum.

6. **Anus**: Finally, the waste material is expelled from the body through the anus, which is the final part of the digestive tract.

### Correct Order:
Thus, the correct chronological order for the flow of food from mouth to anus is:
**Mouth → Oesophagus → Stomach → Small Intestine → Large Intestine → Anus**