. The common frog. Frogs. rx.] THE COMMON FROG. 135 blood is checked on the right side {if), while on the left it runs freely into the pulmo-cutaneous trunks (r and /), and thus the respiratory structures receive unmixed venous blood for Fig. 79.—Diagram of section of Frog's Heart. LA, left auricle ; RA, right auricle ; V, ventricle ; s, moveable septum dividing the left aortic passage Ip from the right aortic passage ip w, valve ; 3, 3, aortic trunks leading to/, pulmonary artery, and r, cutaneous respiratory artery; 2, 2, aortic trunks going to form the great dorsal aorta ; cg
. The common frog. Frogs. rx.] THE COMMON FROG. 135 blood is checked on the right side {if), while on the left it runs freely into the pulmo-cutaneous trunks (r and /), and thus the respiratory structures receive unmixed venous blood for Fig. 79.—Diagram of section of Frog's Heart. LA, left auricle ; RA, right auricle ; V, ventricle ; s, moveable septum dividing the left aortic passage Ip from the right aortic passage ip w, valve ; 3, 3, aortic trunks leading to/, pulmonary artery, and r, cutaneous respiratory artery; 2, 2, aortic trunks going to form the great dorsal aorta ; cgld, carotid gland interrupting the flow of blood into /, the lingual artery, and c, the carotid artery. As the lungs get gorged with blood, the resistance on the two sides of the septum of the bulb becomes at first equalised and soon becomes the greater on the left side ; then the septum is forced over to the left, and the blood, now mixed with pure blood, flo^ving in from the left auricle, flows freely along the systematic arteries (2 and 2). The obstruction of the carotid glands {c gld) being the greatest and the last to be overcome, the carotid and lingual arteries [c and /) receive the very last of the blood—that, namely, which coming from the left auricle is purely arterial—. 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 Mivart, St. George Jackson, 1827-1900. London, Macmillan and co.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1881
