Fluid Transport: Concentration of the Intercellular Compartment

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Science  13 Mar 1970:
Vol. 167, Issue 3924, pp. 1497-1498
DOI: 10.1126/science.167.3924.1497


Intercellular spaces of Periplaneta rectal pads are visible at a magnification of x 100 and distend during fluid uptake. Samples (0.025 to 0.1 nanoliter) obtained by micropuncture from the spaces were consistently more concentrated than the fluid in the rectal lumen. This observation supports the hypothesis of "local" osmosis in epithelial fluid transport.

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