MORPHOLOGY OF LYMPHATICS IN THE CANINE LARGE INTESTINE

T Hirashima, D Kuwahara, M Nishi

Abstract


The finer distribution of lymphatics in the large
intestine of adult dogs was morphologically examined
by puncture injection of colored dyes, intra-arterial
injection of silver nitrate mixed with India ink, and
electron microscopy. In the lamina propria there was
a double-layer of lymphatic channels - a shallow
network (near the mucosal surface) and a deep compartment
(just above the muscularis mucosae). Sparse
lymph capillaries also extended vertically parallelling
intestinal glands. Some lymphatics penetrated into
the submucosa where they demonstrated prominent
valves and formed collecting lymphatic trunks
alongside blood vessels.


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