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Cell junctions acting as intestinal valves in nematodes
Author(s) -
Seymour Malcolm K.,
Shepherd Audrey M.
Publication year - 1974
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.1974.tb04131.x
Subject(s) - biology , anatomy , membrane , leakage (economics) , biophysics , microbiology and biotechnology , biochemistry , macroeconomics , economics
Serial sections of the rectal valve in Aphelenchoides blastophthorus Franklin and the oesophago‐intestinal valve in Thornenema wickeni Yeates were examined electron microscopically. Each valve when closed appears as a convoluted path of closely apposed (10 nm) pairs of three‐layered cell membranes. Both valves serve to stop intestinal leakage, open briefly and rapidly by forcible dilatation and are closed by pressure from surrounding tissues, helped perhaps by intermolecular forces.