The first building to use a steel frame in St. Louis was the Wainwright Building, a 10-story office building and one of the first modern skyscrapers. The building, which was designed by Louis Sullivan and Dankmar Adler, illustrates Sullivan's principle of form follows function.
keratinocyte. [keratâ²inÅsÄ«tâ²]. Etymology: Gk, keras + kytos, cell. an epidermal cell that synthesizes keratin and other proteins and sterols. These cells constitute 95% of the epidermis, being formed from undifferentiated, or basal, cells at the dermal-epidermal junction.
Now let's zoom in on the actual cells that make up the epidermis. In general, the skin is made of epithelial cells, or cells that are tightly packed together in layers. Cells known as keratinocytes are the primary members of the epidermis. These are the cells that are made by the stratum basale and move outwards towards the stratum corneum.