Archive image from page 153 of The development of the chick;. The development of the chick; an introduction to embryology . developmentofchi00lill Year: 1908 134 THE DEVELOPMENT OF THE CHICK KFAm, : Fig. 71. — Entire embryo of 16 s, drawn from above as a transparent object. Note the cranial flexure, also the rotation of the head on its left side, au. P., Auditory pit. F. B., Fore-brain. H. B. 1, First division of the hind brain. H. F. Am., Head-fold of the amnion. Hm. F., Hyomandibular furrow. Pr'am., Proam- nion. M. B., Mid-brain, op. Ves., Optic vesicle, pr. str., Primitive s
Archive image from page 153 of The development of the chick;. The development of the chick; an introduction to embryology . developmentofchi00lill Year: 1908 134 THE DEVELOPMENT OF THE CHICK KFAm, : Fig. 71. — Entire embryo of 16 s, drawn from above as a transparent object. Note the cranial flexure, also the rotation of the head on its left side, au. P., Auditory pit. F. B., Fore-brain. H. B. 1, First division of the hind brain. H. F. Am., Head-fold of the amnion. Hm. F., Hyomandibular furrow. Pr'am., Proam- nion. M. B., Mid-brain, op. Ves., Optic vesicle, pr. str., Primitive streak, s 2, s 4, s 16, Second, fourth, and sixteenth somites. V. o. m., omphalo-mesenteric vein. VII-VIII, The acustico-facialis primordium. IX-X, Primordium of the glossopharyngeus and vagus. The entire trunk tends also to bend ventrally, , to develop a dorsal convexity, and this approximates its posterior end to the tip of the head. These flexures are characteristic of amniote
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