동물들의 공통조상에서 가장 이르게 분기된 종오래 사는건 몇만년도 산다 SpongeSponges, the members of the phylum Porifera, are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.https://en.wikipedia.org/wiki/Sponge
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