. Text-book of embryology. Embryology. an. Fig. 187.—Illustrating modification of the carotid arteries, correlated with elongation of the neck region. A, Varanid Lizard ; B, Grass-snake (Tropidonotus); , primary carotid. (Other letters as in Fig. 1S6.) embryology. The general lines of these processes are best illustrated by an outline of what happens in the group Reptilia. The arrangement which the main arteries assume in adult Reptiles shows much variety. The relation which the adult arrangement in the more important Reptilian types bears to the primitive scheme may be gathered f
. Text-book of embryology. Embryology. an. Fig. 187.—Illustrating modification of the carotid arteries, correlated with elongation of the neck region. A, Varanid Lizard ; B, Grass-snake (Tropidonotus); , primary carotid. (Other letters as in Fig. 1S6.) embryology. The general lines of these processes are best illustrated by an outline of what happens in the group Reptilia. The arrangement which the main arteries assume in adult Reptiles shows much variety. The relation which the adult arrangement in the more important Reptilian types bears to the primitive scheme may be gathered from an inspection of Figs. 186, C, 187, .A, B, and 187a, Through the conspicuous differences in 1 It must be remembered that in the actual animal the various bends and turns of the vessels tend to become straightened out. For example arch III becomes simply a portion of a straight internal carotid artery. In the diagrams the original curvature of the arches is retained for the sake of 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 MacBride, E. W. (Ernest William), 1866-1940; Kerr, John Graham, 1869-; Heape, Walter, 1855-1929. London : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpubli, booksubjectembryology
