头腹腺 ventral head gland

互联网2013-11-14

659

　　亦称为腹面腺或头部腺。是不完全变态昆虫的胚胎和幼虫（若虫）的内分泌腺，认为是完全变态昆虫前胸腺的原始形态。在胚胎期，于咽侧体后面由下颚节发生，总之是位于后头部的腹面。也有由分散的细胞构成的（吸血蝽象），多数是圆形的小腺体。对于蝗虫在胚胎期已引起脱皮。某些种类到幼虫期，向前胸部移动、称为前胸腺。甲壳类的 Y器官与此腺体起同样的作用。

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