Spongin, a modified type of collagen protein, forms the fibrous skeleton of most organisms among the phylum Porifera, the sponges. It is secreted by sponge cells known as spongocytes
例句与用法
1.
You re a loafer , that s what , an i ain t asleep . you ain t goin to do no spongin off me just because i m marryin your sister 你这个懒虫，你就是懒，我可不糊涂，你别因为我要娶你的妹妹就想来占什么便宜。
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