In Star Fish the upper side contains

Options

A. Mouth
B. Mouth and ambulacral grooves
C. Anus
D. Anus and madreporite.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Anatomy of Starfish**:
- Starfish, or sea stars, have two distinct surfaces: the oral surface (the underside) and the aboral surface (the upper side).

2. **Identifying the Upper Side**:
- The upper side of the starfish is referred to as the aboral surface. This is the side that faces away from the substrate when the starfish is resting.

3. **Components of the Upper Side**:
- On the aboral surface, you will find the anus, which is an important part of the digestive system.
- Additionally, the madreporite is also located on the upper side. The madreporite is a sieve-like structure that plays a crucial role in the water vascular system of echinoderms.

4. **Conclusion**:
- Therefore, the correct answer to the question "In Star Fish the upper side contains" is "anus and madreporite."

**Final Answer**: The upper side of the starfish contains the anus and madreporite.

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