Want this question answered?
Cnidarians do not have spicules. Spicules are commonly found in sponges and it is a simply a skeleton which has very tiny splinters that look like needles.
25
Sponges have collar cells, osculum, and spicules.
it is scleroblast cells which produce spicules which are modified amoebocytes
Sponges have collar cells, osculum, and spicules.
3
Grantia belong to the class Calcarea, a class of marine sponges characterized by their calcareous (calcium carbonate) spicules. They are filter feeders that are commonly found in shallow coastal waters.
Grantia compressa was created in 1780.
Porifera. http://en.wikipedia.org/wiki/Grantia
There are many features that distinguish grantia as an animal. The main feature is locomotion which is a key feature for animals.
Yes, they are called spicules, not pores or spiracles as many people think.
Spicules are tiny structures of hard crystal that give the sponge it's shape. There are many different types of spicules, some examples are; acanthostyles, stongyles, and anatriaenes.
It's asymmetrical.
Spicules provide structural support.
Spicules, like our skeleton, give the sponge structure. Without spicules, Sponge Bob would be Sponge Blob.
Cnidarians do not have spicules. Spicules are commonly found in sponges and it is a simply a skeleton which has very tiny splinters that look like needles.
upright