In Earthworm the effective organ for food digestion is

Options

A. Pharynx
B. Buccal cavity
C. Mouth
D. Stomach

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Digestive System of Earthworm**: The earthworm has a specialized digestive system that processes food efficiently. It consists of several organs that work together to digest food.

2. **Identifying the Organs**: The main organs involved in the digestive process of an earthworm include:
- Mouth
- Buccal cavity
- Pharynx
- Oesophagus
- Gizzard
- Stomach

3. **Role of Each Organ**:
- **Mouth**: The mouth is the entry point for food. It is where the ingestion of food occurs.
- **Buccal Cavity**: This cavity holds the food particles temporarily after they are ingested.
- **Pharynx**: The pharynx is a muscular organ that plays a crucial role in digestion. It is responsible for moving the food from the buccal cavity to the oesophagus and is involved in the initial breakdown of food.
- **Oesophagus**: This is a tube that connects the pharynx to the gizzard.
- **Gizzard**: The gizzard grinds the food, mixing it with soil and decaying organic matter, which is essential for the earthworm's diet.
- **Stomach**: The stomach is where further digestion occurs, and nutrients are absorbed.

4. **Determining the Effective Organ for Digestion**: Among these organs, the pharynx is identified as the first effective organ for food digestion in the earthworm. It initiates the digestive process by breaking down food before it moves to the gizzard and stomach.

5. **Conclusion**: Therefore, the correct answer to the question "In Earthworm the effective organ for food digestion is" is the **pharynx**.

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