Funnel-shaped ciliated pits on the ventral side of kidney of Frog

Options

A. Ostia
B. Nephrostomes
C. Nephridiopores
D. Coelomostomes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the funnel-shaped ciliated pits located on the ventral side of the kidney of a frog.

2. **Identifying the Options**: The options provided are:
- Ostea
- Nephrostom
- Nephrediopores
- Filioma stumps

3. **Analyzing Each Option**:
- **Ostea**: This term refers to the openings in sponges that allow water to enter. Since this is related to sponges and not frogs, this option is incorrect.

- **Nephrostom**: This term refers specifically to the funnel-shaped ciliated pits found on the ventral side of the frog's kidney. These structures are involved in collecting excretory products and directing them into the renal system. This option is correct.

- **Nephrediopores**: These are openings associated with the nephridia, which are excretory organs in certain organisms like annelids and flatworms. Since this is not relevant to frogs, this option is incorrect.

- **Filioma Stumps**: This term refers to a condition in which the digestive system is suspended within a fluid-filled cavity. This is unrelated to the kidney structure in frogs, making this option incorrect.

4. **Conclusion**: Based on the analysis, the correct answer to the question is **Nephrostom**.

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