Hyposmotic fluid formation in Hydra.

Abstract:

: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.

journal_name

Tissue Cell

journal_title

Tissue & cell

authors

Benos DJ,Kirk RG,Barba WP,Goldner MM

doi

10.1016/0040-8166(77)90045-3

subject

Has Abstract

pub_date

1977-01-01 00:00:00

pages

11-22

issue

1

eissn

0040-8166

issn

1532-3072

pii

0040-8166(77)90045-3

journal_volume

9

pub_type

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