Porifera skeletons are composed of spicules (siliceous or calcareous needle-like structures), and spongin fibers are found in bath sponges.
The skeleton of Porifera consists of spicules (siliceous or calcareous needle-like structures), with spongin fiber found in the bath sponge.
| Front | Skeleton of Porifera contains |
|---|---|
| Back | Spicules calcarious or siliceous needle-like structures Spongin fibre is present in bath sponge |
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