Succus entericus is secreted by

Options

A. crypts of Lieberkuhn
B. Brunner's glands
C. both of these
D. none of these

Explanation

**Step-by-Step Solution:**

1. **Understanding the Term "Succus Entericus":**
- Succus entericus refers to the intestinal juice secreted by the intestinal glands. It plays a crucial role in digestion by containing various enzymes that help break down food.

2. **Identifying the Source of Succus Entericus:**
- The question asks where succus entericus is secreted from. The options provided are:
- Crypts of Lieberkühn
- Brunner's gland
- Both of these
- None of these

3. **Analyzing the Options:**
- **Crypts of Lieberkühn:** These are small glands located in the lining of the intestine that secrete succus entericus.
- **Brunner's Gland:** These glands are located in the duodenum and secrete alkaline mucus to neutralize stomach acid but are not primarily responsible for succus entericus.
- **Both of These:** This option suggests that both crypts of Lieberkühn and Brunner's gland secrete succus entericus, which is incorrect.
- **None of These:** This option implies that none of the listed structures secrete succus entericus, which is also incorrect.

4. **Conclusion:**
- The correct answer is that succus entericus is secreted by the **crypts of Lieberkühn**.

**Final Answer:** Succus entericus is secreted by the crypts of Lieberkühn.

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