. The biology of the frog. Frogs. THE CIRCULATORY SYSTEM 281 demarcated by a sulcus. (4) The truncus arteriosus is somewhat narrower than the bulbus; it soon divides into two diverging trunks, which give rise to three arteries, the common carotid, the aorta, and the Fig. 90.—The heart of a frog cut open and seen from the ventral side. a, a', bristle passed into the left carotid trunk; , auriculo-ven- tricular valves ; b, 7/, bristle passed into the left systemic trunk ; c, c\ bristle in left pulmo-cutaneous trunk; , carotid artery; , carotid gland; cart, bulb
. The biology of the frog. Frogs. THE CIRCULATORY SYSTEM 281 demarcated by a sulcus. (4) The truncus arteriosus is somewhat narrower than the bulbus; it soon divides into two diverging trunks, which give rise to three arteries, the common carotid, the aorta, and the Fig. 90.—The heart of a frog cut open and seen from the ventral side. a, a', bristle passed into the left carotid trunk; , auriculo-ven- tricular valves ; b, 7/, bristle passed into the left systemic trunk ; c, c\ bristle in left pulmo-cutaneous trunk; , carotid artery; , carotid gland; cart, bulbus cordis (conus arteriosus of some authors) ; , carotid trunk; , left auricle; , lingual ar- tery ; , longitudinal or spiral valve; , pulmo-cutaneous trunk ; , opening of pulmonary veins; , right auricle ; ap, sinu-auricular aperture ; , inter-auricular septum ; v, v\ valves; vt, ventricle. (From Parker and Haswell's Zoology.) On the dorsal side of the heart is the triangular, thin- walled sinus venosus; at the two anterior angles of the sinus the precaval veins, or anterior vence cavce, enter; the poste-. 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 Holmes, Samuel J. (Samuel Jackson), 1868-. New York : The Macmillan company
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Keywords: ., bookauthorholmessamueljsamuelja, bookcentury1900, bookdecade1920
