- This does not have a nervous system
- Glass sponges
- They lack an epidermal covering, and their skeletons are composed of spicules of silica
- Characterized by siliceous spicules that consist of six rays intersecting at right angles
- Early branch within the Porifera because it is an "outcast" of other sponges
- Tissues are syncitia, which is extensive regions of multinucleate cytoplasm
- They are not able to contract
- It posses a unique system for rapidly conducting electrical impulses across their body, allowing them to react quickly to eternal stimuli
- When the living tissue of the sponge is removed, the cylindrical skeletons often have the appearance of spun glass
- Glass sponges
- They lack an epidermal covering, and their skeletons are composed of spicules of silica
- Characterized by siliceous spicules that consist of six rays intersecting at right angles
- Early branch within the Porifera because it is an "outcast" of other sponges
- Tissues are syncitia, which is extensive regions of multinucleate cytoplasm
- They are not able to contract
- It posses a unique system for rapidly conducting electrical impulses across their body, allowing them to react quickly to eternal stimuli
- When the living tissue of the sponge is removed, the cylindrical skeletons often have the appearance of spun glass