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Surface Scanning Observations of Changes in Caenorhabditis Briggsae During Aging

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For more content, see Nematology.

SEM observations of adult Caenorhabditis briggsae females showed differences between young and old nematodes. In young nematodes the cuticle was generally smooth, whereas in old ones it was wrinkled. Deirids were located at the level of the excretory pore in the lateral field. They were distinct in young nematodes but indistinct in old ones. The oral opening was formed by six lips, which were closed in old nematodes and open in young ones. The vulva possessed two semi-circular lips and was bordered by two lateral flaps. These lips were smooth in young specimens and wrinkled in old ones. Cryofractures of old nematodes showed cavities in the intestinal epithelium corresponding to areas in which age pigment granules normally occur. No such cavities were seen in young nematodes.

Affiliations: 1: ) Department of Plant Science, Macdonald College of McGill University, Ste. Anne de Bellevue, Que. Canada HOA 1CO; 2: Department of Plant Science, Macdonald College of McGill University, Ste. Anne de Bellevue, Que. Canada HOA 1CO; 3: Laboratory of Experimental Biology, College of Food and Natural Resources and Massachusetts Agricultural Experiment Station, University of Massachusetts, East Wareham, Mass. 02538 U.S.A.


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