. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. 78 COMPARATIVE ZOOLOGY. the Lobster, have a short gullet leading to a large cav- ity, situated in the front of the animal, which is a giz- zard, rather than stomach, as it has thick muscular walls armed with teeth. A well- marked constric- tion separates this organ from the in- testine. The liver is highly devel- oped; instead of numerous folli- cles, there is a large bilaterally symmetrical or- gan, divided into three lobes on each side, pouring its secre
. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. 78 COMPARATIVE ZOOLOGY. the Lobster, have a short gullet leading to a large cav- ity, situated in the front of the animal, which is a giz- zard, rather than stomach, as it has thick muscular walls armed with teeth. A well- marked constric- tion separates this organ from the in- testine. The liver is highly devel- oped; instead of numerous folli- cles, there is a large bilaterally symmetrical or- gan, divided into three lobes on each side, pouring its secretion into the upper part of the intestine, which is the true stomach. Among Insects, there is great vari- ation in the form and length of the. canal. Thefollow- Fig. 40.—Anatomy of a Caterpillar: g, h, oesophagus; h, i, stomach ; k, hepatic vessels; I, m, intestine; q, r, sal- ivary glands; p, salivary duct; a, b, c, longitudinal :no,mrffl PQri tracheal trunks; d, e, air-tubes distributed to the vis- 11J& F"111& L<U1 8eu" cera; /, fat-mass; v, x, y, silk-secretors; z, their ex- grallv be distin- cretory ducts, terminating in t, the spinneret, or fu- # " suius. guished: gullet, crop, gizzard, stomach, and large and small intestines, with many glandular appendages. The crop, gizzard, and large intestine are sometimes absent, especially in the carnivorous. 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 Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950. New York : Harper & Bros.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1883
