Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . 12 ENTOMOLOGY. projections lining it. The apparatus of teeth does nottriturate the food, which has been sufficiently comminutedby the jaws. This is proved by the fact, says Plateau, thatthe parcels of food are of the same form and size as thosein the crop, before passing through the six large lateral pouches (caeca) emptying into thecommencement of the stomach (ventriculus) are true glands,. FIG. 6.—Digestive canal of a Carabid beetle. 6, oesophagus; c, crop; d, proven-triculus; /,
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . 12 ENTOMOLOGY. projections lining it. The apparatus of teeth does nottriturate the food, which has been sufficiently comminutedby the jaws. This is proved by the fact, says Plateau, thatthe parcels of food are of the same form and size as thosein the crop, before passing through the six large lateral pouches (caeca) emptying into thecommencement of the stomach (ventriculus) are true glands,. FIG. 6.—Digestive canal of a Carabid beetle. 6, oesophagus; c, crop; d, proven-triculus; /, chyle-stomach; g, posterior division of the stomach: /, the twopairs of urinary tubes; h, intestine; fc, rectum; I, anal glands.—After Dufour,from Judeich and Nitsche. which secrete an alkaline fluid, probably aiding in the stomach (ventriculus) the portion of the food whichhas resisted the action of the crop is submitted to the actionof a neutral or alkaline liquid, never acid, secreted by speciallocal glands or by the lining epithelium. In the ileum andcolon active absorption of the liquid portion of the foodtakes place, and the intestine proper (ileum and colon) isthus the seat of the secondary digestive phenomena. Thereaction of the secretion is neutral or alkaline. The rectumis the stercoral reservoir. It may be empty or full of liquids,but never contains any gas. The liquid products secretedby the urinary tubes are here accumulated, and in certaincircumstances here deposi
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
