The innermost layer lining the lumen of the alimentary canal is the ______

Answer

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

1. **Understanding the Structure of the Alimentary Canal:**
- The alimentary canal is a long tube that runs from the mouth to the anus, responsible for the digestion and absorption of food.

2. **Identifying the Layers of the Alimentary Canal:**
- The alimentary canal consists of several layers, each with specific functions. The main layers include:
- Serosa (outermost layer)
- Muscularis
- Submucosa
- Mucosa (innermost layer)

3. **Focusing on the Innermost Layer:**
- The innermost layer of the alimentary canal is crucial as it directly interacts with the contents of the canal (the food being digested).

4. **Naming the Innermost Layer:**
- The innermost layer that lines the lumen of the alimentary canal is called the **mucosa**. This layer is responsible for secreting digestive enzymes and absorbing nutrients.

5. **Conclusion:**
- Therefore, the answer to the question is: The innermost layer lining the lumen of the alimentary canal is the **mucosa**.

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