The digested food in small intestine is absorbed into blood vessels in the walls of small intestine through millions of tiny finger-like outgrowths called W. The undigested and unabsorbed food from the small intestine enters into another organ X. The organ X absorbs most of the water from the undigested waste food material making ir semi-solid. This semi-solid waste is stored in Part Y of organ X for some time. It is passed out from the body through part Z in the form of faeces.
What is the name of the process in which undigested waste is thrown out of the body?

Answer

**Step-by-Step Solution:**

1. **Identify the Tiny Finger-like Outgrowths**: The tiny finger-like outgrowths in the walls of the small intestine that absorb digested food are called **villi**.

2. **Determine the Organ for Undigested Food**: The undigested and unabsorbed food from the small intestine enters the **large intestine** (Organ X).

3. **Function of the Large Intestine**: The large intestine absorbs most of the water from the undigested waste food material, making it semi-solid.

4. **Storage of Semi-Solid Waste**: The semi-solid waste is stored in the **rectum** (Part Y) of the large intestine for some time.

5. **Excretion of Waste**: The semi-solid waste is passed out from the body through the **anus** (Part Z) in the form of feces.

6. **Name of the Process**: The process in which undigested waste is thrown out of the body is called **egestion**.

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