File:Bryce1908 plate04.jpg

Plate 4. Section of Blastocyst

Fig. 4. Section of Blastocyst. x200 d.

The cyto-trophoblast appears as a blue-pink lamella with irregular nuclei. Directly continuous with it are strands of plasmodiuni ; only the central strands of the plasmodium are represented. The mesoblast is shown as a mass of mucous tissue. The delicate blue reticulum which forms its base is largely a precipitation product ; in it are numerous small rounded or spindle-shaped cells, which form a very loose syncytial tissue. The mesoblast has shrunk away from the cyto-trophoblast on the left, and in the centre is the retraction cavity containing a portion of the torn amnio-embryonic vesicle.

Bryce 1908 Human Ovum: Plate 1 | Plate 2 | Plate 3 | Plate 4 | Plate 5 | Plate 6 | Plate 7 | Plate 8 | Plate 9 | Plate 10

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