Which of the following cells maintain the current of water in the sponges ?

Options

A. Choanocytes
B. Myocytes
C. Pinacocytes
D. porocytes

Answer

To answer the question "Which of the following cells maintain the current of water in the sponges?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Sponge Structure**:
- Sponges have a unique body structure that includes various types of cells. One of the key features of sponges is the presence of pores (ostia) through which water enters and exits.

2. **Identifying Key Cell Types**:
- The main types of cells in sponges include:
- **Choanocytes**: These cells have flagella and are responsible for creating water currents.
- **Myocytes**: These are muscle cells, not present in sponges.
- **Pinacocytes**: These cells form the outer layer and are involved in adhesion and signaling.
- **Porocytes**: These cells form the pores (ostia) but do not actively pump water.

3. **Function of Choanocytes**:
- Choanocytes, also known as collar cells, have flagella that beat to create a current of water flowing through the sponge. This current is essential for bringing in food particles and oxygen while removing waste.

4. **Conclusion**:
- Based on the functions of the different cell types, it is clear that the **Choanocytes** are the cells that maintain the current of water in sponges.

### Final Answer:
The cells that maintain the current of water in sponges are **Choanocytes**.

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