Alimentary canal is a tube like structure containing a lumen in the centre which is called

Options

A. enteric cavity
B. gastric cavity
C. foregut
D. ectodermis

Answer

**Step-by-Step Solution:**

1. **Understanding the Alimentary Canal**: The alimentary canal is a continuous tube-like structure that runs from the mouth to the anus. It is responsible for the digestion and absorption of food, as well as the excretion of waste.

2. **Identifying the Lumen**: The central part of the alimentary canal is known as the lumen. It is the hollow space within the tube where food passes through.

3. **Naming the Lumen**: The specific name given to the lumen of the alimentary canal is the "enteric cavity." This term refers to the central cavity that facilitates digestion and nutrient absorption.

4. **Function of the Enteric Cavity**: The enteric cavity plays a crucial role in the digestive process. It allows for the breakdown of food, absorption of nutrients, and the movement of waste products towards excretion.

5. **Comparison with Other Structures**: While the term "gastric cavity" may also be used in other organisms (like cnidarians and platyhelminthes), the correct term for the lumen in the alimentary canal of humans and many other animals is the enteric cavity.

**Final Answer**: The lumen in the center of the alimentary canal is called the "enteric cavity."

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