Whichone develop from ectoderm

Options

A. Adrenal medulla
B. Adrenal cortex
C. Blood
D. Lymph.

Answer

**Step-by-Step Solution:**

1. **Understanding Germ Layers**: In the early stages of embryonic development, the cells differentiate into three primary germ layers: ectoderm, mesoderm, and endoderm. Each layer gives rise to different tissues and organs in the body.

2. **Identifying the Ectoderm**: The ectoderm is the outermost layer and is responsible for developing into structures such as the skin, nervous system, and certain glands.

3. **Analyzing the Options**:
- **Option A: Adrenal Medulla**: The adrenal medulla is part of the adrenal glands and is involved in the production of hormones like adrenaline. It is derived from the ectoderm.
- **Option B: Adrenal Cortex**: The adrenal cortex is the outer part of the adrenal gland, which produces different hormones. It is derived from the mesoderm.
- **Option C: Blood and Lymph**: These are types of connective tissues that are derived from the mesoderm.

4. **Conclusion**: Since the adrenal medulla is the only structure listed that develops from the ectoderm, the correct answer is **Option A: Adrenal Medulla**.

**Final Answer**: The structure that develops from the ectoderm is the **Adrenal Medulla** (Option A).

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