The hand-book of household scienceA popular account of heat, light, air, aliment, and cleansing, in their scientific principles and domestic . n is considerably ad-vanced. The motion is not absolutely constant, but continues for afew minutes at a time. If the food remains in the stomach threehours it travels round and round through this circuit two or threehundred times:—to what purpose ? C39. Miaate arrangements for Stomach Digestion.—Before considering what takes place in the stomach, we must have a closer view of its mechanism. The lining layer of this organ is curi- J-^ ously
The hand-book of household scienceA popular account of heat, light, air, aliment, and cleansing, in their scientific principles and domestic . n is considerably ad-vanced. The motion is not absolutely constant, but continues for afew minutes at a time. If the food remains in the stomach threehours it travels round and round through this circuit two or threehundred times:—to what purpose ? C39. Miaate arrangements for Stomach Digestion.—Before considering what takes place in the stomach, we must have a closer view of its mechanism. The lining layer of this organ is curi- J-^ ously and admirably constructed, though it requires vSSinB^^ the microscope to see it. Magnified about 70 ^^Sj^Mj^j^ diameters the mucous membrane exhibits the honey- ^^SStSn/^/ combed appearance seen in Fig. 116. Into these •^^^^^IR* reticulated spaces, there open little cup-shaped J^SS^ cavities called stomach follicles, which are about It^^ 1*200 of an inch in diameter. They are closely packed together in the mucous membrane, so that when it is cut through, and viewed with the microscope, it looks DIGESTION—CHANGES IN THE STOMACH. 337 Fia. like pallsadiiig, or like little flasks or test-tubes close packed and up-right ; many thousands of these upright cylindrical cavities beingset in a square inch of surface. They are of different depths indifferent parts of the stomach, and they terminate at the bottom inminute closed tubes. The arrangement has beenlikened to a little glove, the hand of which opensinto the stomach, while the fingers are buried inthe tissue beneath. Fig. 117, represents the se-creting follicles in the stomach of a dog aftertwelve hours abstinence; «, from the middle re-gion of the stomach ; 5, from near the pylorus; c d,the mouths opening upon the surface, e /, the closedtubes imbedded in the membrane below. The wallsof these cavities are webbed over with a tissue ofmost delicate bloodvessels, carrying streams of blood—a network of veins surround
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectfood, booksubjecthome
