. Comparative anatomy. Anatomy, Comparative. THE RESPIRATORY SYSTEM 333 History of the Gills. Pharyngeal gills are peculiar to chordates and are one of the most constant characteristics of the group. This should not be understood to imply that invertebrates are without structures from which gills might have evolved. The origin of gills from endodermic diverticula suggests the possibility that their beginnings may be seen in NEUROPORE BRAIN MOUTH t -I. SPINAL CORD NOTOCHORD. ENCXX>ERMIC STRAND A. LARVAL UROCHORDATE. NEUROPORE MYOTOME I NOTOCHORD NEURENTERIC CANAL. Please note that these imag
. Comparative anatomy. Anatomy, Comparative. THE RESPIRATORY SYSTEM 333 History of the Gills. Pharyngeal gills are peculiar to chordates and are one of the most constant characteristics of the group. This should not be understood to imply that invertebrates are without structures from which gills might have evolved. The origin of gills from endodermic diverticula suggests the possibility that their beginnings may be seen in NEUROPORE BRAIN MOUTH t -I. SPINAL CORD NOTOCHORD. ENCXX>ERMIC STRAND A. LARVAL UROCHORDATE. NEUROPORE MYOTOME I NOTOCHORD NEURENTERIC CANAL. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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