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cephalochordate
释义
cephalochordate
Encyclopedia
理学
头索动物
释
cephalochordate
头索动物
现存最原始的脊索动物,位于脊索动物系统树基部。头索动物无真正的头,习惯也称无头类,脊索纵贯全身,向前一直延伸到身体背神经管的前方,这在所有脊索动物是仅有的现象,故而被称为头索动物。
Biology
cephalochordate
头索动物
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