On food and its digestion: being an introduction to dietetics . calibre or cavity of the intestinal tube. L 4 152 DIGESTION. responding gastric capillaries. They anastomose freelywith the capillaries of the adjacent villi; the venous radi-cles of which join the confluent venous capillaries aroundthe mouths of these tubes, to form small veins that sinkvertically through the mucous membrane, to join the sub-mucous plexus of the portal system. Fig. Vertical and longitudinal section of the small intestine in the lower part ofthe jejunum, showing the general arrangement of its coats. {Magnifie
On food and its digestion: being an introduction to dietetics . calibre or cavity of the intestinal tube. L 4 152 DIGESTION. responding gastric capillaries. They anastomose freelywith the capillaries of the adjacent villi; the venous radi-cles of which join the confluent venous capillaries aroundthe mouths of these tubes, to form small veins that sinkvertically through the mucous membrane, to join the sub-mucous plexus of the portal system. Fig. Vertical and longitudinal section of the small intestine in the lower part ofthe jejunum, showing the general arrangement of its coats. {Magnified50 diameters.) a, villi; b< intestinal tubes ; c, submucous areolar tissue ; d, circular fibresof the muscular coat; e, longitudinal fibres, external to these, covered byperitoneum. Villi.—The inner surface of the small intestine hasalmost everywhere a texture like that of velvet; soft,shaggy, yielding readily to pressure, and, on inspection,seen to be composed of innumerable short thread-like VILLI OR PAPILLAE. 153 processes, which are seated vertically on the general wall ofthe canal. These processes which, as the cause of thisvelvety appearance, are named villi, might be much betternamed, in consonance with their form and situation oroffice, the intestinal or chyliferous papillae. Pig. 21.
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Keywords: ., bookauthorbrintonw, bookcentury1800, bookdecade1860, bookyear1861
