Microanatomy of the bell rim of Aurelia aurita (Cnidaria: Scyphozoa)
Microanatomy of the bell rim of Aurelia aurita (Cnidaria: Scyphozoa)
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DOI：
10.1139/cjz-77-1-34
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发表时间：
1999-01-01
影响因子：
1.4
通讯作者：
Chapman, DM
中科院分区：
文献类型：
--
作者：
Chapman, DM
详细描述了Aurelia Aurita的铃铛边缘。这种美杜莎通常具有八个边缘感官综合体和许多触手室，后者由屋顶，侧面（lappets）组成，地板是触手室的唯一内容物，是一些Bladelike Tentacle Base。远端的触手是狭窄且是单型的，并且在深层侧面，深处有一块肌肉纤维。在触手室的地板的底面和一个更具圆周的法兰（假伏氏菌）之间。纤毛的食物槽衬有厚实的露天上皮，其中含有普通的表面细胞，粘液细胞和假定的消化细胞。苏子是双层的，带有外皮层，可将细胞质薄片发送到中毛。更深的IU：一层肌细胞，每个肌细胞都带有横纹圆形肌纤维。朝向外围和伪伏之前，是：光滑的径向肌细胞的边缘与上皮层覆盖。伪伏氏菌的肿瘤侧具有光滑的径向上皮细胞。伪伏氏菌附着在苏子氏菌上时，神经肌肉绳横穿中毛，连接触角的崇拜侧。沿犀牛之间的食物凹槽和中途是伪伏氏菌的一个口袋，即收集浮游生物的食物小袋。轮辋的旁波区域不同，因为触手室的地板短或不存在。经过修改的胸间分区有时会在伪伏氏菌的大部分侧形成突起。伪伏镇在隆帕附近向外转弯，形成了隆巴罩的薄片。这种类型的轮辋专门用于浓度，也许是浮游生物的早期消化。
The bell rim of Aurelia aurita is described in detail. This medusa has usually eight marginal sensory complexes and many tentacle chambers, the latter made up of a roof, sides (lappets), and a floor The sole contents of a tentacle chamber are a few bladelike tentacle bases. The distal tentacle is narrow and moniliform and grooved on the adoral side with a folded sheet of muscle fibers on the deep side. Between the underside of the tentacle chamber's floor and a more adoral circumferential flange (pseudovelarium) lies. a ciliated food groove lined with a thick amuscular epithelium containing ordinary surface cells, mucous cells, and presumed digestive cells. The subumbrella is bilayered, with an outer epithelial layer that sends thin cytoplasmic sheets to the mesoglea; deeper iu: a layer of myocytes each with a striated circular myofibril. Towards the periphery, and before the pseudovelarium,, is: a rim of smooth radial myocytes overlaid with an epithelial layer. The adoral side of the pseudovelarium has smooth radial epitheliomuscular cells. Where the pseudovelarium attaches to the subumbrella, neuromuscular cords traverse the mesoglea to join the adoral side of the tentacles. Along the food groove and midway between rhopalia is a pocket in the pseudovelarium, the food pouch, which collects plankton. The pararhopalial region of the rim is different in that the floor of the tentacle chamber is short or absent; a modified intertentacular partition can sometimes form a protuberance on the aboral side of the pseudovelarium; and the pseudovelarium takes a right-angled turn outwards near the rhopalium to form the thin part of the rhopalial hood. This type of rim is specialized for the concentration and, perhaps, the early digestion of plankton.