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The endodermal derivatives include...

The endodermal derivatives include

A

Thyroid

B

Pineal gland

C

Spleen

D

Pituitary

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Identify the Derivatives of Endoderm**: The question requires us to identify which structures arise from the endoderm layer during embryonic development. 2. **List the Given Options**: The options provided include: - Thyroid - Pineal gland - Spleen - Pituitary gland 3. **Analyze Each Option**: - **Thyroid Gland**: The thyroid gland is known to arise from the endoderm. Therefore, it is an endodermal derivative. - **Pineal Gland**: The pineal gland originates from the ectoderm, not the endoderm. - **Spleen**: The spleen is derived from the mesoderm, making it a mesodermal derivative. - **Pituitary Gland**: The pituitary gland also arises from the ectoderm, specifically from the oral ectoderm. 4. **Conclusion**: Based on the analysis, the only structure that arises from the endoderm is the thyroid gland. Therefore, the correct answer is: - **Thyroid** (Option 1).

### Step-by-Step Solution: 1. **Identify the Derivatives of Endoderm**: The question requires us to identify which structures arise from the endoderm layer during embryonic development. 2. **List the Given Options**: The options provided include: - Thyroid - Pineal gland - Spleen ...
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