A system of obstetrics . XI View of Area Pellucidaof Young Blastoderm of chick,showing first appearance of prim-itive streak (from Balfour): pellucida; , inner mar-gin of area opaca ; PRjS, primitivestreak. pr Fig. 22. Wr. Cross-section of Embryo of chick througl) the Primitive Streak, the blastoderm being of aboutthe same age as that represented in Pig. 21 (from Balfour). The section passes acimiddle of the primitive streak : , primitive streak ; ep, epiblast; hy, hypoblast. THE EARLY STAGES OF DEVELOPMENT. 107 coincides with the long axis of the future embr
A system of obstetrics . XI View of Area Pellucidaof Young Blastoderm of chick,showing first appearance of prim-itive streak (from Balfour): pellucida; , inner mar-gin of area opaca ; PRjS, primitivestreak. pr Fig. 22. Wr. Cross-section of Embryo of chick througl) the Primitive Streak, the blastoderm being of aboutthe same age as that represented in Pig. 21 (from Balfour). The section passes acimiddle of the primitive streak : , primitive streak ; ep, epiblast; hy, hypoblast. THE EARLY STAGES OF DEVELOPMENT. 107 coincides with the long axis of the future embryo. The embryo, how-ever, develops entirely in front of the primitive streak, the front end Fig. 23.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectobstetrics, bookyear1
