Sthohr's histology : arranged upon an embroyological basis (1906)
Sthohr, Philipp, 1849-1911, Lewis, Frederic Thomas, 1875 · Philadelphia : P. Blakiston's Son & Co. · leaf 316
villi in the earliest stages are composed entirely of epi-thelium, but they soon acquire a core of the chorionic mesenchymal tissuein which are the terminal branches of the umbilical vessels. The epithe-lium is very early divisible into two layers. The outer layer consists ofdensely staining… … Fig. 349.—Isolated Termixal Branxhes op^Chorionic Villi; that on the Left is fro.m an EmbryoOF Twelve Weeks; on the Right at Full Term. (Minot.) may accumulate in knots or proliferation islands, especially in latestages. The knots project from the surface of the villi so that in certainplanes of…
Histology · Microscopy
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