the adenohypophysial sinusoids attain their full set-up during the last third of embryonic life , and the main features of the differentiation process of the capillary wall concern : ( 1 ) a progressive thinning of the endothelium commencing at the 14th i.d. , accompanied by a reduction of the cytoplasmic organelles of its cells from the 16th i.d . ;
C1179962
cytoplasmic organelles
C0007634
cells