. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. 208 PHYSIOLOGY OF THE DOMESTIC ANIMALS. always, however, a gullet, craw, gizzard, large and small intestines, and numerous glandular appendages may be recognized (Fig. 63). In the vermiform larvae the alimentary canal is a straight tube passing from one end of the body to the other, the dilatations which represent the stomach and crop appearing later. Cieca are also then present, and there is hence a division into small and large intestines. In
. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. 208 PHYSIOLOGY OF THE DOMESTIC ANIMALS. always, however, a gullet, craw, gizzard, large and small intestines, and numerous glandular appendages may be recognized (Fig. 63). In the vermiform larvae the alimentary canal is a straight tube passing from one end of the body to the other, the dilatations which represent the stomach and crop appearing later. Cieca are also then present, and there is hence a division into small and large intestines. Inmandibulate insects, as in the wasps and beetles, the crop and stomach are glandular, and the gizzard, unlike that of birds, is placed above the stomach, and has muscular walls' and a chitinous lining-membrane. In insects the form of the liver has again returned to that of long, slender tubes, pouring their secretion into the intestine, and which are believed to represent biliary canals (Fig. 63). In carniv- orous insects the crop and gizzard and large intestine are less developed than in those which feed on vege-. Fig. 63.—Digestive Apparatus of Honey- bee (Apis mellifica), after Leon Du- four. pi, salivary gland; glo. poison-gland: »(, stint; on oesophagus; •», vasa malpighii; c, colon; r, rectum- myl, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Robert Meade, 1854-. Philadelphia and London, F. A. Davis
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectphysiol, bookyear1890
