The American journal of anatomy . Ent. Ent. 2 34. Ent. 3- 35 THE EMBRYOLOGY OF THE BIRDs LUNG previous!}^ ventro-lateral border laterad, and the previously dor-sal border towards the median plane. During the last half of the sixth day (fig. 28, 5 days, 20 hours),the slender stalk of the first entobronchus extends dorsally fora short distance, then curves mesially and expands, the trend isagain dorsad, and finally, laterad. The enlarged bladder-likeextremity lies directly above the bronchus (fig. 29) and some-what anterior to the point where the stalk joins the br
The American journal of anatomy . Ent. Ent. 2 34. Ent. 3- 35 THE EMBRYOLOGY OF THE BIRDs LUNG previous!}^ ventro-lateral border laterad, and the previously dor-sal border towards the median plane. During the last half of the sixth day (fig. 28, 5 days, 20 hours),the slender stalk of the first entobronchus extends dorsally fora short distance, then curves mesially and expands, the trend isagain dorsad, and finally, laterad. The enlarged bladder-likeextremity lies directly above the bronchus (fig. 29) and some-what anterior to the point where the stalk joins the bronchus. Soon the distal enlargement of the entobronchus begins todivide as shown in figures 30 and 32. One bud-like outgrowth() extends cephalad and constitutes the primordium ofthe cervical air-sac. The other bud, visible from this position,extends laterad and ventrad. It is not, however, until a later period that the divisions of thefirst entobronchus can be clearly seen. On the ninth day ofdevelopment (figs. 36 and 37), the first entobronchus exhibitsthree pr
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Keywords: ., bookauthorwi, bookcentury1900, bookdecade1910, booksubjectanatomy
