. A manual of elementary zoology . Zoology. THE FROG ; VISCERA AND VASCULAR SYSTEM 55 Thus the blood from the left auricle (and therefore from the lungs), which is the last to enter the truncus, passes along. Fig. 28.—A ventral view of the heart of a frog, opened to show the internal structure. The ventral wall of the truncus, ventricle, and auricles has been removed, with part of the spiral valve (at the dotted line). ;., Auriculo-ventricular valves \, carotid arch ;, cavum aorticum ; cavum pulmocutaneum; , chorda? tendineae; , left auricle ; , opening o
. A manual of elementary zoology . Zoology. THE FROG ; VISCERA AND VASCULAR SYSTEM 55 Thus the blood from the left auricle (and therefore from the lungs), which is the last to enter the truncus, passes along. Fig. 28.—A ventral view of the heart of a frog, opened to show the internal structure. The ventral wall of the truncus, ventricle, and auricles has been removed, with part of the spiral valve (at the dotted line). ;., Auriculo-ventricular valves \, carotid arch ;, cavum aorticum ; cavum pulmocutaneum; , chorda? tendineae; , left auricle ; , opening of pulmonary vein ; o.^c, opening of dorsal division of synangium, by which blood passes from the cavum pulmocutaneum to the pulmocutaneous arch \, pulmocutaneous arch ; , right auricle ; , sinu-auricular opening with valves ; j/.( first row of semilunar valves ; si'., semilunar valves of second row ; j/.i, the semilunar valve from which the spiral valve starts; sl'.z, small semilunar valve at end of cavum pulmocutaneum; , a small part of a large semi- lunar valve, of which the rest extends across that portion of the front wall of the truncus which has been removed; , spiral valve; , systemic arch; wall of truncus arteriosus; tr'.t one of the two bundles of arteries into which the truncus divides; v., ventricle. the cavum aorticum into the systemic and carotid arches. The blood in the systemic arch is a mixture of that from the right and left auricles; the final portion which passes. 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 Borradaile, L. A. (Lancelot Alexander), 1872-1945. London : H. Frowde, Hodder & Stoughton
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920
