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.... _____ epithelium (Anat.), epithelium in which the cells are priismatic in form, and set upright on the surface they cover. -- _____ structure (Geol.), a structure consisting of more or less regular columns, usually six-sided, but sometimes with eight or more sides. The columns are often fractured transversely, with a cup joint, showing a concave surface above. This struct...


 


1. COLUMNAR
2. CILIARY
3. AREOLAR
4. FOURCHETTE
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