Benos D J, Kirk R G, Barba W P, Goldner M M
Tissue Cell. 1977;9(1):11-22. doi: 10.1016/0040-8166(77)90045-3.
A detailed model for hyposmotic fluid formation in Hydra is presented. We propose that enteron fluid formation occurs in two steps: (1) segregation of an isosmotic fluid in large intercellular vacuoles with (2) subsequent reabsorption of solute in the intercellular channels to form the hyposmotic fluid of the enteron. Intercellular spaces in Hydra have been studied by light microscopy and thin-section electron microscopy, as well as by electrophysiological methods. These spaces are of two types: (1) large vacuoles which are located in the cells of both the epidermis and gastrodermis, being more numerous in the epidermis; and (2) lateral intercellular channels which run from the intercellular vacuoles, leading eventually to the enteron. These vacuoles and channels are highly convoluted, forming a complex three-dimensional network. We suggest that the network is involved in the water balance of Hydra.
本文提出了水螅低渗液形成的详细模型。我们认为肠液的形成分两步进行：（1）在大的细胞间液泡中分离出等渗液，（2）随后溶质在细胞间通道中被重吸收，从而形成肠的低渗液。水螅的细胞间隙已通过光学显微镜、超薄切片电子显微镜以及电生理方法进行了研究。这些间隙有两种类型：（1）大液泡，位于表皮和胃皮层的细胞中，在表皮中数量更多；（2）从细胞间液泡延伸并最终通向肠的侧向细胞间通道。这些液泡和通道高度卷曲，形成一个复杂的三维网络。我们认为该网络参与了水螅的水平衡。
