Spicules provide structural support.
spongin and spicules are the sponges body support and defence
spicules
calcarea - have calcite spicules, often have calcite exoskeletons glass sponges - silica spicules, no exoskeleton demosponges - silica spicules, may have exoskeleton, made of aragonite if present
Sponges have collar cells, osculum, and spicules.
Sponges have collar cells, osculum, and spicules.
Sponges have collar cells, osculum, and spicules.
Spicules, like our skeleton, give the sponge structure. Without spicules, Sponge Bob would be Sponge Blob.
Spicules
Spicules
A calcisponge is any of a group of marine sponges containing calcareous spicules - spicules which resemble calcium carbonate.
Spicules
Spongin and spicules are the sponges body support and defence. They both cover a sponge, and if a predator eats it it will be hurt. It will be hard to eat it, because of the sharpness and roughness of the outside. Well at least in the spicules case.