. First lessons in zoology. Zoology. f)0 FIRST LESSONS IN ZOOLOGY tubes, etc. Worms (figs. 55 and 56), crabs, and snails (^ have a definite alimentary canal \ with certain parts set apart for I special processes. In the verte- brates the digestive apparatus varies from a relatively simple straight tube to the very long and complex alimentary canal of the cow (fig. 57). All these forms depend much on the nature of the food of the individual animal, and the processes necessary to turn it into body material. To illustrate what complexity of the digestive sj'stem may be reached let us consider som
. First lessons in zoology. Zoology. f)0 FIRST LESSONS IN ZOOLOGY tubes, etc. Worms (figs. 55 and 56), crabs, and snails (^ have a definite alimentary canal \ with certain parts set apart for I special processes. In the verte- brates the digestive apparatus varies from a relatively simple straight tube to the very long and complex alimentary canal of the cow (fig. 57). All these forms depend much on the nature of the food of the individual animal, and the processes necessary to turn it into body material. To illustrate what complexity of the digestive sj'stem may be reached let us consider somewhat in detail the structure of the ali- mentar\' canal of a small mammal -a rabbit, for example. First is. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903
