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蚂蟥学名叫蛭,属环节动物门(Annelida),蛭钢(Hirudinea)。据报道,全世界现有300多种,我国有八、九十种,四川有20种左右。蛭类一般背腹扁平,前端较窄,全体呈叶片状或蠕虫状。前后两端都有吸盘。前吸盘较小,围绕在口的周围,口中有三个具细齿的颚。后吸盘较发达,杯状,多朝向腹面。蛭类是雌雄同体,异体受精。由生殖带的分泌物形成卵茧。医蛭的卵茧呈椭园形,内层光滑,外层为蜂窝状,颜色与人的皮肤相似。受精卵直接在卵茧中发育,无幼虫期。一个卵茧中能孵
Leech science name leeches, is annelida door (Annelida), Hirudinea (Hirudinea). It is reported that there are over 300 species in the world, eighty and ninety in our country, and about 20 in Sichuan. Leech generally flat dorsoventral, narrow front, all were leaf-like or worm-like. Both ends of the sucker. Front sucker smaller, around the mouth around the mouth with three serrated jaws. Sucker after the more developed, goblet, and more towards the ventral surface. Leech is hermaphrodite, allogeneic fertilization. Egg cocoon formed by genital discharge. Medical leech eggs were oval-shaped cocoon, the inner smooth, the outer layer of honeycomb, the color and human skin similar. Fertilized eggs directly in the egg cocoon development, no larval stage. A egg cocoon can hatch