. The development of the chick; an introduction to embryology. Birds -- Embryology. 310 THE DEVELOPMENT OF THE CHICK left, as in mammals; in the chick the lateral bending of the stomach appears to be uncomplicated by any such rotation. The curvature leaves a large space within it to the right containing the meatus venosus and liver, in short, the entire median mass of the septum transversum. The main divisions of the intestine are marked out by their position, size-relations and structure before the closure of the yolk-stalk; thus on the third day the oesophagus appears as a constricted portio
. The development of the chick; an introduction to embryology. Birds -- Embryology. 310 THE DEVELOPMENT OF THE CHICK left, as in mammals; in the chick the lateral bending of the stomach appears to be uncomplicated by any such rotation. The curvature leaves a large space within it to the right containing the meatus venosus and liver, in short, the entire median mass of the septum transversum. The main divisions of the intestine are marked out by their position, size-relations and structure before the closure of the yolk-stalk; thus on the third day the oesophagus appears as a constricted portion immediately behind the pharynx, and the stomach as a spindle-shaped enlargement behind the oesophagus; the duodenum is indicated at the same time by the hepatic and. Fig. 179. — Viscera of a chick embryo of 6 days, seen from the right side. (After Duval.) All., Allantois. Au. r., Right auricle. , Bulbus arteriosus, c. pr., Caecal pro- cesses. D. L., Loop of the duodenum. Giz., Gizzard. Lg. r., Right lung. Li., Liver. R., Rectum, t. R., Tubal ridge. V., Ven- tricle. W. B., Wolffian body. Y. St., Yolk stalk. X., Duodeno-jejunal flexure. pancreatic outgrowths. The form of the intestine on the sixth day is illustrated in Figure 179. Behind the stomach, the intes- tine forms two loops descending ventrally. The first or duodenal loop is relatively slightly developed at this time, and forms an open curve just beneath the right lobe of the liver. Its ascend- ing limb rises to a high dorsal position jvist behind the liver, and. 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
Size: 1579px × 1582px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrattray187, bookcentury1900, bookdecade1900
