Mention two functions of the canal system in sponges.

Explanation

### Step-by-Step Solution:

1. **Identify the Organism**: Sponges belong to the phylum Porifera. They are characterized by their porous body structure.

2. **Understand the Canal System**: The canal system in sponges is also referred to as the aquiferous system. This system is crucial for the movement of water through the sponge.

3. **Function 1 - Nutrient Acquisition**: One primary function of the canal system is to facilitate the trapping of food particles. As water enters through small openings called ostia, it carries food particles which are then trapped by specialized cells within the sponge.

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