File:Florian1935 plate02.jpg

Plate II


Fig.5. Section 32, passing through the prochordal plate and the cranial extremity of the thin part of the head-process (between arrows 1 and 2). x391.


Fig. 6. Section 79, passing through the sequestered mesoderm of the connecting stalk (above "s.C.s."). a.c. amniotic cavity. s.e. stalk-ectoderm. a.m. stalk-mesoderm. Dorsal side above. x391.

Fig.7. Section 97,passing through the connecting stalk and the primitive streak. In the connecting stalk, the primordia of the umbilical arteries (u.a.1andu.a.2)canbeseen.The mesothelium of the connecting stalk shows a deep invagination at v.p.(vessel-primordium). a.c.am- nioticcavity. p.s.primitivestreak. x115.

Fig.8. Section75,passing through the ventral wall of the yolk-sac(seetext,p.404).y.8.c.=yolk- saccavity. en.endoderm. d.e.diverticulum of the endoderm directed towards the mesoderm. m.mesoderm. x186.

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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>