File:Florian1935 plate01.jpg

Plate I


Fig. 1. Section 49, passing through the cranial extremity of Hensen's knot, which is situated between arrows 2 and 3. The lateral margins of the primitive streak mesoderm are indicated by arrows 1 and 4. x391.


Fig.2. Section 43, passing through the caudal, more compact part of the head-process (chorda-process), situated between arrows 2 and 3. The lateral margin of primitive streak mesoderm indicated by arrow 1; the margin on the other side is not included in the figure. x391.

Fig.3. Section40,passing through the more cranial part of the chorda-process. Designations as in fig.2. x391.


Fig.4. Section37,passing through the wider, less compact cranial part of the head-process (between arrows 2 and 3). The lateral margins of primitive streak mesoderm indicated by arrows 1 and 4. ek., ectoderm of the embryonal shield, artificially detached from the underlying tissue. x391.

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Reference

An Early Human Embryo (No. 1285, Manchester Collection), with Capsular Attachment of the Connecting Stalk

<pubmed>17104547</pubmed>| PMC1249055</ref>