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Carnegie Stage   Figure

Dorsal view and median reconstruction

Dorsal view and median reconstruction

Dorsal view and median reconstruction of No. 7801 stage 6, in alignment. The dorsal view, which is based on a graphic reconstruction by the present writers, shows the location of the primitive streak and primitive groove. The median reconstruction is based on a drawing by James F. Didusch (Heuser et al., 1945, Plate 3). The primitive streak is indicated by vertical lines, and the cross-hatched area (containing a question mark) suggests the site of the future cloacal membrane. The connecting stalk comprises amnio-embryonic and umbilical stalks. The figure references are to the sections reproduced by Heuser et al., 1945, Plates 1 and 2.

Fig. 6-5. O'Rahilly and Müller, 1987.

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Keywords: amnio-embryonic stalk, amniotic cavity, cloacal membrane, connecting stalk, primitive groove, primitive streak, umbilical stalk, umbilical vesicle cavity


Source: The Virtual Human Embryo.