Diagram of a sea sponge

The diagram of a sea sponge below show basic parts of a sea sponge. The diagram of a sea sponge shows what sea sponges are made of. 

Number 1 marked on the diagram of a sea sponge below indicates the excurrent opening where water leaves.

Number 4 marked on the diagram of a sea sponge below indicates the incurrent opening where water enters through tubular cells all over the sea sponges body.

Number 5 marked on the diagram of a sea sponge below indicates collar cells which move water with flagella and trap food particles on the collar.

 Basic parts of sea sponges

Number 2 marked on the diagram of a sea sponge marks spicule of the sea sponge.

Number 3 marked on the diagram of a sea sponge shows gelatinous layer of a sea sponge.

The blue arrow on the diagram of a sea sponge indicates water movement.

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