. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. ORGANS OF circulation: I91 the dorsal aorta, or they may leave it as a single trunk, — the common iliac. From the internal iliac, arteries arise to supply the various viscera of the pelvis, and also an ischiatic or sciatic artery, which passes out to the dorsal portion of the hind limb, and early forms the chief supply of this appendage. This condi- tion persists in all vertebrates except the mammals. In these the external iliac (after its entrance into the limb known as the. Fig. 203. Diagram of the chief circulatory vessel
. Text book of vertebrate zoology. Vertebrates; Anatomy, Comparative. ORGANS OF circulation: I91 the dorsal aorta, or they may leave it as a single trunk, — the common iliac. From the internal iliac, arteries arise to supply the various viscera of the pelvis, and also an ischiatic or sciatic artery, which passes out to the dorsal portion of the hind limb, and early forms the chief supply of this appendage. This condi- tion persists in all vertebrates except the mammals. In these the external iliac (after its entrance into the limb known as the. Fig. 203. Diagram of the chief circulatory vessels in an embryonic sauropsidan. The amnion omitted for clearness. A, allantois; AA, allantoic artery; C, carotid arteries; CA, caudal artery; CV, caudal vein; DA, dorsal aorta; DC, ductus Cuvierii; H, heart; HA, hypogastric artery; /., liver; OA, omphalomesaraic artery; OV, omphalomesaraic vein; S7\ sinus terminalis ; UV, umbilical (allan- toic) vein; V, vent; VV, vitelline vein. Compare with Fig. 197. femoral artery) extends farther into the limb, and usurps the function of the ischiatic, which here supplies only the posterior proximal portion of the appendage. The femoral artery extends down into the bend of the knee, where it is known as the pop- liteal artery, and in the proximal end of the shank divides into an anterior tibial artery which runs along the anterior face of the limb, and a posterior tibial and a peroneal in the calf of the 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 Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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