. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. FiQ. 119.—Diagrams of the aortic arches of mammal (Landois and Stirling, after Rathke). 1. ArteriaJ trunk with one pair of arches, and an indication where the second and tliird pairs will develop. 2. Ideal stage of five complete arches; the fourth clefts are shown on the left side. 3. The two anterior pairs of arches have disappeared. 4. Transition to the final stage. A, aortic arch ; ad, dorsal aorta ; ax, subclavian or axillary artery; Ce, ex- te
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. FiQ. 119.—Diagrams of the aortic arches of mammal (Landois and Stirling, after Rathke). 1. ArteriaJ trunk with one pair of arches, and an indication where the second and tliird pairs will develop. 2. Ideal stage of five complete arches; the fourth clefts are shown on the left side. 3. The two anterior pairs of arches have disappeared. 4. Transition to the final stage. A, aortic arch ; ad, dorsal aorta ; ax, subclavian or axillary artery; Ce, ex- ternal carotid ; Ci, internal carotid; dB, ductus arteriosus Botalli; P, pulmonary artery; S, subclavian artery; ta, truncus arteriosum; v, vertebral artery. sus gives off and receives branches. The ductus venosus Aran- tii persists throughout life. (Compare the various figures illus- trating the circulation.). 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 Mills, Wesley, 1847-1915. New York, D. Appleton
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