Which of the following is not an endocrine gland

Options

A. Liver
B. Pancreas
C. Testes
D. Thymus

Answer

To determine which of the following is not an endocrine gland, we need to first understand what an endocrine gland is.

### Step-by-Step Solution:

1. **Define Endocrine Glands**:
- Endocrine glands are ductless glands that secrete hormones directly into the bloodstream. They play a crucial role in regulating various bodily functions.

2. **Analyze the Options**:
- We need to evaluate each option given in the question to identify which one does not fit the definition of an endocrine gland.

3. **Evaluate Each Option**:
- **Liver**: The liver produces bile, which is involved in digestion and acts as a food storage organ. It does not primarily function as an endocrine gland since it does not secrete hormones directly into the bloodstream.
- **Pancreas**: The pancreas has both endocrine and exocrine functions. It secretes hormones like insulin and glucagon directly into the blood, making it an endocrine gland.
- **Testes**: The testes produce androgens (such as testosterone) and secrete them into the bloodstream, classifying them as endocrine glands.
- **Thymus**: The thymus secretes thymosin, which is essential for T-cell development, and is also classified as an endocrine gland.

4. **Conclusion**:
- Based on the evaluation, the liver is the only option that does not function as an endocrine gland. Therefore, the correct answer is the liver.

### Final Answer:
**The liver is not an endocrine gland.**

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