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海蜇,为腔肠动物门、钵水母纲、根口水母目、根口水母科水面浮游动物。体呈淡蓝色,分伞与口腕两部。伞部高而厚,半球形馒头状,表面光滑,伞缘直径30-50厘米,大者可达1米。中胶层很发达、坚硬,是由蛋白质和粘多糖形成的凝胶。其中含胶原纤维有很大的弹性,能维持及调节离子的成分及浓度,使身体在海水中保持一定的浮力。中胶层有变形细胞,它对动物的再生和组织修复起重要作用。围绕下伞缘有由外胚层形成的环行肌肉,触手上有纵行肌肉,收缩时造成海蜇的运动。下伞中央的垂唇末端向外延伸形成8个口腕,具触手曩。口腕各有分歧,其上方有8对皱缩的肩板,呈弯刀状。口腕
Jellyfish, for the coelenterate door, bowl Jellyfish category, the root of the jellyfish head, root gourd family of surface zooplankton. Body was light blue, umbrella and wrist two. Umbrella high and thick, hemispherical bread-like, smooth surface, umbrella edge diameter of 30-50 cm, the largest of up to 1 meter. The glue is well developed and hard, a gel made of protein and mucopolysaccharide. Collagen fibers contain a lot of flexibility, can maintain and adjust the ion composition and concentration, so that the body in the sea to maintain a certain buoyancy. In the plastic layer of deformed cells, it plays an important role in animal regeneration and tissue repair. Surrounding the umbrella edge there is a ring-shaped muscle formed by the ectoderm, tentacles have longitudinal muscles, contraction caused jellyfish movement. Under the umbrella of the central vertical lip ends extending outward to form eight wrist, with tentacles 曩. Disagreement on the wrist, the top of its 8 pairs of shrunk shoulder, scimitar-like. Wrist