. The development of the chick; an introduction to embryology. Birds -- Embryology. 324 THE DEVELOPMENT OF THE CHICK has correspondingly in the adult three separate ducts opening into the duodenum. (Two pancreatic ducts is the rule in Gallus, according to Gadow in Bronn's Thierreich.) Of the three pan- creatic diverticula, the dorsal one arises first (about 72 hours) then the right ventral slightly earlier than the left ventral (about 96 hours). The two latter arise from the common Mist. \^ ;. * <3. -y-M. â Coel. Goel D-J)e/) a J).J) Fig. 188. â Transverse
. The development of the chick; an introduction to embryology. Birds -- Embryology. 324 THE DEVELOPMENT OF THE CHICK has correspondingly in the adult three separate ducts opening into the duodenum. (Two pancreatic ducts is the rule in Gallus, according to Gadow in Bronn's Thierreich.) Of the three pan- creatic diverticula, the dorsal one arises first (about 72 hours) then the right ventral slightly earlier than the left ventral (about 96 hours). The two latter arise from the common Mist. \^ ;. * <3. -y-M. â Coel. Goel D-J)e/) a J).J) Fig. 188. â Transverse section through the duodenum and hepato- pancreatic ducts of a chick embryo of 5 days. (After Choronschitzky.) Ao., Aorta, cav. F., Caval fold. Coel., Coelome. D. hep. 2, 2 a, 2 b, Posterior hepatic diverticulum and branches of same. Du., Du- odenum. Li., Substance of Hver. M'st., Dorsal mesentery. Pa. Dorsal pancreas. Pa. v. Right ventral pancreas. Pa. v. s., Left ventral pancreas. Spl., Spleen. V. c. p., Postcardinal vein. V. li., Vena lienalis. V. o. m. d., Right omphalomesenteric vein. V. o. m. s., Left omphalomesenteric vein. hepatic diverticulimi near its junction with the duodenum (Fig. 188). The differentiation of the three parts is essentially similar, and proceeds naturally in the order of their origin. Solid buds arise from the ends of the diverticula, and these branch repeatedly in the surrounding mesenchyme, but do not anastomose; 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 Lillie, Frank Rattray, 1870-1947. New York, Holt
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