. The alligator and its allies. Alligators. The Digestive System 187. power drawing of the posterior region is shown in Figure 52. The anterior and posterior regions of the large intestine do not differ from each other sufficiently to make it worth while to represent both by drawings. Had an entire section through either region been drawn it would be seen that the wall is of very different thickness in different places, as was noted in connection with the small intestine; the posterior section was drawn where the wall was thin. It might be supposed that in the feeding season the fecal matter i
. The alligator and its allies. Alligators. The Digestive System 187. power drawing of the posterior region is shown in Figure 52. The anterior and posterior regions of the large intestine do not differ from each other sufficiently to make it worth while to represent both by drawings. Had an entire section through either region been drawn it would be seen that the wall is of very different thickness in different places, as was noted in connection with the small intestine; the posterior section was drawn where the wall was thin. It might be supposed that in the feeding season the fecal matter in the posterior re- gion of the rectum would stretch the walls sufficiently to obliterate largely the prominent folds seen in Fig- ure 52, but such does not seem to be the case. The usual layers of the vertebrate intestine are present. The epithelium, shown under high magnifica- tion in Figure 53, is of the same character and thick- ness throughout, except that as the anal aperture is approached the columnar epithelium changes into the stratified variety. It consists of very tall and narrow columnar cells apparently in one layer, though it is difficult to be sure of this. With an •.•!-~-^.;iX"^S>XrS?-' •mm® • FIG. 53. The epithelium of the anterior region of the rectum of the hibernating ani- mal, under high magnifica- tion; e, epithelium; tp, tunica 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 Reese, A. M. (Albert Moore), b. 1872. New York, London, G. P. Putnam's Sons
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Keywords: ., bookauthorreeseama, bookcentury1900, bookdecade1910, bookyear1915
