Canal system is the speciality of which phylum ?

Options

A. Porifera
B. Coelenterata
C. Echinodermata
D. None

Answer

To determine which phylum has a canal system as its specialty, we can analyze the options provided:

1. **Identify the phyla**: The options given are:
- A. Porifera
- B. Cnidaria (Cilentrata)
- C. Echinodermata
- D. None

2. **Understand the characteristics of each phylum**:
- **Porifera**: This phylum is known for having a canal system. Poriferans, or sponges, have a network of canals and pores that allow water to flow through their bodies. This system is essential for their feeding, respiration, and excretion.
- **Cnidaria**: Members of this phylum, such as jellyfish and corals, have tentacles with stinging cells (nematocysts) but do not possess a canal system.
- **Echinodermata**: This group includes starfish and sea urchins, which have a water vascular system used for locomotion and feeding, but not a canal system like that of Porifera.

3. **Conclusion**: Based on the characteristics of each phylum, it is clear that the canal system is a specialty of the phylum **Porifera**.

**Final Answer**: The canal system is the specialty of **A. Porifera**.

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