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.
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.
Prominences
chromosphere
Yes, they are called spicules, not pores or spiracles as many people think.
Spicules provide structural support.
Sun spots and prominences.
Prominences can screw up satellites.
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.
Sponges have collar cells, osculum, and spicules.
Sponges have collar cells, osculum, and spicules.
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.