primary mesenchymal cells are different from embryonic ectoderm cells , from which they are derived , not only by the absence of desmosomes and intermediate-sized filaments of the cytokeratin type but also by their variable morphology not exhibiting stable polar architecture , and their numerous cytoplasmic processes which make contacts with the basal lamina of the ectoderm , the basal cell surface of the proximal endoderm , and other mesenchymal cells .
C0011703
desmosomes
C0699040
cell surface of