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外套膜名词解释

更新时间: 2020-10-30 00:00:00     

外套膜(mantle)是软体动物、腕足动物以及尾索动物覆盖体外的膜状物。其中软体动物的外套膜背缘与内脏团背面的上皮组织相连,由内外两侧表皮和中央的结缔组织以及少数的肌纤维所构成。外套膜一般包裹着内脏团和鳃,部分种类连足也包在里面。外套膜与内脏团之间,与外界相通的空腔称外套腔,大多数水生种类外套腔中有腮,故也称鳃腔。通常排泄孔、生殖孔和肛门都开口于外套腔,故有便于水流进出,辅助摄食、呼吸、生殖,运动等功能。

关键词: 外套 名词 解释

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