Spicules are spiny structures of sponges, used to harden their outside and deter predators, making them harder to chew and digest. They can be made of a range of substances including silicium (glass!).
A spicule is a skeletal material made of calcium carbonate found in sponges.
The major function of spicule is to provide structural support to the organisms. Spicules also play other roles and one of the roles is to provide deterrence from predators that might attack.
spongin is the soft material that makes up a sponge´s skeleton and spicule provides support for the sponge.
protection against predators
An amphidisc is a spicule with a denticulate wheel at each end, found in freshwater sponges.
Skeleton made up of spicule supports most sponges .
The spicule in a sponge is its skeleton. It provides strength in the sponge.
The major function of spicule is to provide structural support to the organisms. Spicules also play other roles and one of the roles is to provide deterrence from predators that might attack.
The composition of their Skeletons.The Calcarea have single nucleus, single external membrane cells. Their 'Spicule' (Structural Element) is Calcite. They commonly have a massive Calcite exoskeletonThe Glass Sponges cells are mostly syncytia (large structure filled with cytoplasm and many nuclei), and their Spicule is Silica. They never have an exoskeleton.Finally, the Demosponges have the same calls as the Calcarea, but their Spicule is Silica, like the Glass Sponges. Some species have an exoskeleton, which will be formed of Aragonite if present.
Macule, molecule, lenticule, ridicule, spicule, miniscule, reticule, locule, graticule, saccule
1) Prominence 2) Solar Flare 3) Granule 4) Sunspot 5) Spicule
1) Prominence 2) Solar Flare 3) Granule 4) Sunspot 5) Spicule
1) Prominence 2) Solar Flare 3) Granule 4) Sunspot 5) Spicule
spongin is the soft material that makes up a sponge´s skeleton and spicule provides support for the sponge.
Spicules are spiny structures of sponges, used to harden their outside and deter predators, making them harder to chew and digest. They can be made of a range of substances including silicium (glass!).