SpiculeSpicules are skeletal structures that appear in some types of sponges. They are made of either calcium carbonate or silica. When many are seen together, Poriferan spicules tend to look like a tightly woven mesh of stars, each having between three and six rays. |
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"In the End, we will remember not the words of our enemies, but the silence of our friends." - Martin Luther King Jr. (1929-1968) |
