. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. 410 ELEMENTS OF BIOLOGY The digestive systems of vertebrates may be taken as an example o£ a divergent series (Fig. 226). The digestive systems of all verte- brates are composed of the same essential parts, pharynx, oesophagus,. OESOPHAGUS STOMACH CAECA SMALJL INTESTINE INTESTINE CLOACA. 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 ori
. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. 410 ELEMENTS OF BIOLOGY The digestive systems of vertebrates may be taken as an example o£ a divergent series (Fig. 226). The digestive systems of all verte- brates are composed of the same essential parts, pharynx, oesophagus,. OESOPHAGUS STOMACH CAECA SMALJL INTESTINE INTESTINE CLOACA. 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 Buchanan, James William, 1888-. New York, London, Harper & brothers
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