Figure 1­2
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McGraw-Hill
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Epithelium is classified into two general types: simple and complex. Simple epithelial tissues have one layer of cells
Holdings,
and are further subdivided on the basis of the shape of the cells in that layer. For example, in the previous image,
the cells are cube shaped and form a single layer, hence the name simple cuboidal epithelium.
LLC.
In the image shown here, the cells at the surface are taller than they are wide, and constitute a single layer of cells.
Not
Therefore, the tissue is called simple columnar epithelium (arrow). Often, this class of epithelium has more than one
to
type of cell. The arrowhead indicates a wine glass­shaped cell (goblet cell), which is part of the tissue. The clear area
be
above the nucleus of goblet cells is filled with mucus droplets that are secreted and lubricate the luminal surface of
redistributed
the other cells in the epithelium.
or
modified
in
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way
without
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2

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