Name the structures which support the body of sponges as a skeleton:

Answer

To answer the question regarding the structures that support the body of sponges as a skeleton, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Group of Organisms**:
- Sponges belong to the phylum Porifera. This is important as it sets the context for their structural characteristics.

2. **Understand the Body Structure of Sponges**:
- Sponges are asymmetrical organisms. This means they do not have a defined shape or symmetry like many other animals.

3. **Recognize the Function of Specialized Cells**:
- Sponges have specialized cells called choanocytes (or collar cells) that help in drawing water into the sponge's body. While these cells are crucial for water flow, they are not the supportive structures.

4. **Identify the Support Structures**:
- The primary structures that provide support to the sponge's body are called **spicules**.

5. **Explain the Composition of Spicules**:
- Spicules can be made of different materials, primarily silica (silicon dioxide) or calcium carbonate. These materials contribute to the hardness and strength of the spicules.

6. **Conclude the Answer**:
- Therefore, the structures that support the body of sponges as a skeleton are **spicules**.

### Final Answer:
The structures which support the body of sponges as a skeleton are **spicules**.

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