极区 polar field

互联网2013-11-14

807

又称极板。在栉水母的顶部（感觉极、反口极），有扩向咽头面（包括左右触手对触手面成直角的面）的带状隆起，由密生纤毛的感觉上皮构成。感觉（尤其化学感觉）比一般体表部分敏锐。隆起中心部位有特殊构造的平衡胞。

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