The undigested substance (faeces) enter into the of large intestine through _____valve which prevents backflow of faecal matter -

Options

A. Caecum, ileo-caecal
B. Colon, ileo-colon valve
C. Rectum, Recto-colonic
D. Colon, pyloric valve

Answer

To answer the question regarding the undigested substance (faeces) entering the large intestine, we can follow these steps:

### Step 1: Identify the Structure
The question asks about the valve that allows faeces to enter the large intestine. The structure that serves this purpose is known as the ileocecal valve.

### Step 2: Understand the Function
The ileocecal valve is located between the small intestine (ileum) and the large intestine (cecum). Its primary function is to prevent the backflow of faecal matter from the large intestine back into the small intestine.

### Step 3: Conclude the Answer
Therefore, the undigested substance (faeces) enters the large intestine through the ileocecal valve, which prevents the backflow of faecal matter.

### Final Answer:
The undigested substance (faeces) enters into the large intestine through the **ileocecal valve**, which prevents backflow of faecal matter.

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