Water vascular system is originated from

Options

A. ectoderm
B. mesoderm
C. endoderm
D. both 1) and 3)

Answer

**Step-by-Step Solution:**

1. **Understanding the Water Vascular System**: The water vascular system is a unique feature found in echinoderms, which include organisms like starfish and sea urchins. It plays a crucial role in locomotion, feeding, and respiration.

2. **Identifying the Origin**: To answer the question of where the water vascular system originates, we need to consider the three primary germ layers in embryonic development: ectoderm, mesoderm, and endoderm.

3. **Analyzing the Options**:
- **Option A (Ectoderm)**: This layer typically gives rise to the outer covering of the body and the nervous system.
- **Option B (Mesoderm)**: This layer forms muscles, the circulatory system, and other internal structures.
- **Option C (Endoderm)**: This layer primarily develops into the digestive system and associated organs.
- **Option D (Both A and C)**: This option suggests that the water vascular system could originate from both ectoderm and endoderm.

4. **Conclusion**: Based on the information provided, the water vascular system is specifically derived from the endoderm. Therefore, the correct answer is **Option C (Endoderm)**.

5. **Final Answer**: The water vascular system is originated from the endoderm.

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