. A manual of zoology. Zoology. Fig. 569. Fig. 570. Fig. 569.—Heart and arterial arches of salamander larva (after Boas), a' a- right and left auricles; aa, arterial trunk; ad, dorsal aorta; as, left aortic arch; b, direct connection between afferent and efferent arteries; c, car9tid; /, afferent artery; p, pulmon- ary artery; v, ventricle; 1—4, afferent arteries; I'-j', gills. Fig. 570.—Heart and arches of frog (diagram), a, a,,, right and left auricles; aa, ventral aorta; ad, as, right and left aortic arches (radices aorta;); c, carotid; cu, cutaneus; I, lingualis; p, pulmonary artery; ss, s
. A manual of zoology. Zoology. Fig. 569. Fig. 570. Fig. 569.—Heart and arterial arches of salamander larva (after Boas), a' a- right and left auricles; aa, arterial trunk; ad, dorsal aorta; as, left aortic arch; b, direct connection between afferent and efferent arteries; c, car9tid; /, afferent artery; p, pulmon- ary artery; v, ventricle; 1—4, afferent arteries; I'-j', gills. Fig. 570.—Heart and arches of frog (diagram), a, a,,, right and left auricles; aa, ventral aorta; ad, as, right and left aortic arches (radices aorta;); c, carotid; cu, cutaneus; I, lingualis; p, pulmonary artery; ss, subclavian; v, ventricle; ve, vertebralis; i, 2, 4, persisting arches. undermined by large lymph spaces, the presence of which makes the skinning of a frog such an easy matter. Ossifications in the skin—enor- mously developed in the fossil Stegocephali—occur but rarely (Gymno- phiona) in recent Amphibia. On the other hand, the abundance of chromatophores is noticeable, these, under the influence of the nerves, changing their shape and thus producing color changes in many Amphibia. Theheart (figs. 569, 570) has two auricles, distinctly separated in Anura, a right with venous blood, a left which with pulmonary respiration re- ceives arterial blood. There is, however, but a single ventricle, and 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929, ed. and tr. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
