. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. Fia. 128. FiQ. 121. â Fig. 121.âDevelopment of the heart in the human embiyo, from the fomiih to the sixth week. A. Embryo of four weeks (KSUiker, after Coste). B, anterior, C, posterior views of the heart of an embryo of six weeks (KoUiker, after Ecker). a, upper limit of buccal cavity ; c, buccal cavity ; b, lies between the ventral ends of second and third branchial arches ; d, buds of upper limbs", I, liver ; /, intestine ; 1, superior ven
. A text-book of animal physiology, with introductory chapters on general biology and a full treatment of reproduction ... Physiology, Comparative. Fia. 128. FiQ. 121. â Fig. 121.âDevelopment of the heart in the human embiyo, from the fomiih to the sixth week. A. Embryo of four weeks (KSUiker, after Coste). B, anterior, C, posterior views of the heart of an embryo of six weeks (KoUiker, after Ecker). a, upper limit of buccal cavity ; c, buccal cavity ; b, lies between the ventral ends of second and third branchial arches ; d, buds of upper limbs", I, liver ; /, intestine ; 1, superior vena cava ; 1', left superior vena cava: 1", opening of inferior vena cava ; 2, 2', right and left auricles ; 3, 3', right and left ventricles ; 4, aortic bulb. Fio. 122.âHuman embryo of about three weeks (Allen Thomson), ur, yelk-sac; al, allantois; am, amnion; ae, anterior extremity ; pe, posterior extremity. is effected by the outgrowth of a septum from the ventral wall, which rapidly reaches the dorsal side, when the double ven- tricle thus formed communicates by a right and left auriculo- ventricular opening with the large and as yet undivided 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 Mills, Wesley, 1847-1915. New York, D. Appleton
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