. Anatomy, descriptive and applied. Anatomy. Point where J intei<tinal ' loops cross each other. Mesocolon. Large intes- tine. Small inieS' tine. Figs. 9S4 and 985.—Illustrating two stages in the development of the human alimentary canal and its mesentery. The arrow indicates the entrance to the bursa omentalis. ( The upper part of the foregut becomes dilated in the form of branchial pouches to form the pharynx; the succeeding part remains tubular' and with the descent of the stomach becomes elongated to form the oesophagus. About the fifth week a fusiform dilatation, the future st
. Anatomy, descriptive and applied. Anatomy. Point where J intei<tinal ' loops cross each other. Mesocolon. Large intes- tine. Small inieS' tine. Figs. 9S4 and 985.—Illustrating two stages in the development of the human alimentary canal and its mesentery. The arrow indicates the entrance to the bursa omentalis. ( The upper part of the foregut becomes dilated in the form of branchial pouches to form the pharynx; the succeeding part remains tubular' and with the descent of the stomach becomes elongated to form the oesophagus. About the fifth week a fusiform dilatation, the future stomach, makes its appearance. The stomach, together with a succeeding part of the duodenum, has a ventral mesentery, called the ventral mesogastrium, in addition to its dorsal attachment, the dorsal meso- gastrium. In the base of the dorsal mesogastrium courses the aorta which sup- plies a series of branches, embedded in the mesoderm, to the alimentary tube. The stomach undergoes a further dilatation, and its two curvatures can be recog- nized, the greater directed dorsad and the lesser ventrad, while its two surfaces look to the right and left respectively. The midgut undergoes great elongation and forms a loop which projects downward and forward; from the arch of the loop the vitelline duct passes to the umbilicus. For a time a part of the loop extends beyond the abdominal cavity into the umbilical cord, but is withdrawn into the cavity by the end of the third month. About the sixth week a lateral diverticulum makes its appearance on the caudal part of the loop a short distance from the vitelline duct, and indicates the future cecum and appendix. The part of the loop on the distal side of the cecal diver- ticulum increases in diameter and forms the future ascending and transverse portions of the large intestine. The cecal diverticulum shares only partially in this increase in calibre, its pendant portion remaining rudimentary and forming the appendix. The stomach and intesti
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
