In sponges, the water entres the body through minute pores known as

Options

A. Osculum
B. Ostia
C. Spongocoel
D. Spicules

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the specific structures in sponges through which water enters their bodies.

2. **Identifying the Options**: The options provided are:
- A) Osculum
- B) Ostia
- C) Spongocoel
- D) Spicules

3. **Analyzing Each Option**:
- **Osculum**: This is the large opening at the top of the sponge through which water exits. Therefore, it is not the correct answer for the entry of water.
- **Ostia**: These are the small pores located all over the surface of the sponge through which water enters. This is the correct answer.
- **Spongocoel**: This is the central cavity within the sponge where water flows after entering through the ostia. It is not the entry point.
- **Spicules**: These are structural elements found in sponges that provide support. They do not function as entry points for water.

4. **Conclusion**: Based on the analysis, the correct answer is **Ostia**, as these are the minute pores through which water enters the sponge.

**Final Answer**: The water enters the body of sponges through minute pores known as **ostia**.

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