phylum porifera
2007-07-10 14:39:45 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
Spicules of sponges are formed by a special type of cell called scleroblasts. These are of three types: Calcoblast, silicoblasts, spongioblasts. They secrete calcareous, silicious and spongin fibres(Proteinous), respectively. These are interlaced according to the arrangement of the cells giving rise to the skeletal frame of of specific kind.
2007-07-13 00:17:23 · answer #1 · answered by Ishan26 7 · 0⤊ 0⤋
Spicules In Sponges
2016-11-16 07:55:54 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Spicules are made of calcium carbonate or silica structures meshed together. Calcium carbonate is found in other animal's skeletal systems. Basically, the whole sponge is a soft, water absorbing skeleton with pores for intake of water and nutrients. It's just "squishy" bone.
This is a difficult question. Ironically, sponges are so simple that they are hard to understand. For me at least.
2007-07-10 17:44:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
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RE:
how do spicules form the sponge skeleton?
phylum porifera
2015-08-17 01:40:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Spike-like structures.
2016-03-16 06:18:14 · answer #5 · answered by ? 4 · 0⤊ 0⤋