It helps them stay on the water standing up
It helps them stay on the water standing up
Skeleton made up of spicule supports most sponges .
Silica.
All sponges have a skeleton made of a protein called spongin or mineralized structures composed of calcium carbonate or silica.
spongin!
Sponges don't have skeletons! They are invertebrates which means the creature doesn't have a backbone, but in this case, it doesn't have a skeleton! (I think this is right, I apologize if it isn't)
Although sponges do not have a skeletal system they do have skeleton components that may be made of silicon or lime. A sponge is found in the ocean and is a hollow tube that has several large pores throughout it.
The three classes of sponge skeletons are siliceous or glass sponges (Class Hexactinellida), calcareous sponges (Class Calcarea), and sponges with a fibrous protein skeleton (Class Demospongiae). Each class has unique structural characteristics that support the sponge's body.
Spongin provides structural support in certain marine sponges by forming a flexible, protein-based skeleton. Spicules are tiny, needle-like structures made of calcium carbonate or silica that also provide structural support and protection in sponges, as well as help deter predators.
Sponges
The spike forms a rigid frame that helps support and protect the sponges body.
a. the flagella b. the sponge skeleton c.the hard spicules Is sponge skeleton