Human anatomy, including structure and development and practical considerations . -Hind-brain -I pharyng. pouch Ventral aorta II pharyng. pouch -III pharyng. pouch-Gut-tube Duct of CuvierAorta B I aortic bow ^- Neural tube \ K Gut-tube,lower part Reconstruction of sagittally sectioned human embryoof third week, showing relations of digestive tube. X ^After His model.). 1 pharyng. pouch 2 aortic bow II pharyng. pouchaortic bowIII pharyng. pouch4 aortic bowI\ Lung-anlage Allantoic artery. Reconstruction of digestive tube of preceding em-bryo; aortic bows and tr
Human anatomy, including structure and development and practical considerations . -Hind-brain -I pharyng. pouch Ventral aorta II pharyng. pouch -III pharyng. pouch-Gut-tube Duct of CuvierAorta B I aortic bow ^- Neural tube \ K Gut-tube,lower part Reconstruction of sagittally sectioned human embryoof third week, showing relations of digestive tube. X ^After His model.). 1 pharyng. pouch 2 aortic bow II pharyng. pouchaortic bowIII pharyng. pouch4 aortic bowI\ Lung-anlage Allantoic artery. Reconstruction of digestive tube of preceding em-bryo; aortic bows and trunk also siiown. X 26. (A//etHis model.) tremes, in which the cloaca persists. In the higher mammals the cloacal stage isonly temporary, the cloaca becoming subdi\ided into two compartments by the for-mation of a septum, which grows downward to meet the cloacal membrane. Theanterior comj)artment becomes the uro-genital sinus, the posterior the the remains of the cloacal membrane disappear, and these sjiaces are providedwith the uro-genital cleft and the definiti\e anus rcspectixely. Differentiation of the simple gut-tube into distinctive segments begins with thestomach, which appears as a small spindle-form enlargement at .some little distancebelow the primitive pharynx, the portion of the tube between the two correspond-ing to the early oesophagus. Th
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
