File:Foster098.jpg

FIG. 98. SECTION THROUGH THE BLASTODERM OF A RABBIT ON THE SEVENTH DAY : TAKEN IN FRONT OF THE PRIMITIVE STREAK.

Half of the area is represented.

Towards the end of the sixth day the embryonic area of the rabbit, which has hitherto been round, becomes oval. A diagrammatic view of the whole blastodermic vesicle at about the beginning of the seventh day is given in Fig. 99. The embryonic area is represented in white. The line ge in B shows the extension of the hypoblast round the inside of the vesicle.

Reference

Foster, M., Balfour, F. M., Sedgwick, A., & Heape, W. (1883). The Elements of Embryology. (2nd ed.). London: Macmillan and Co.

Volume 1 - The History of the Chick: Egg structure and incubation beginning | Summary whole incubation | First day | Second day - first half | Second day - second half | Third day | Fourth day | Fifth day | Sixth day to incubation end | Figures 1

Volume 2 - The History of the Mammalian Embryo: General Development | Embryonic Membranes and Yolk-Sac | Organs from Epiblast | Organs from Mesoblast | Alimentary Canal | Appendix | Figures 2

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