Figure 11­2
Downloaded
by
[Rutgers
University
130.219.8.11]
at
[04/08/15].
Copyright
©
McGraw-Hill
Global
Education
The epidermis has several layers of cells that begin at the junction of the dermis and end at the surface. As the cells
Holdings,
progress through the layers, they change in morphology depending on their state of activity. Those in the deepest
layers are the most metabolically active, while those at the surface have ceased functioning and form a protective
layer of keratin.
LLC.
Not
From the internal junction with the dermis to the external surface the layers of thick skin are as follows: (1) stratum
to
basale (also called stratum germinativum); (2) stratum spinosum; (3) stratum granulosum; (4) stratum lucidum;
be
and (5) stratum corneum.
redistributed
The cells of the stratum lucidum and stratum corneum lack nuclei. All the layers are also found in thin skin except
the stratum lucidum, and the outer cornified layer is thinner in thin skin.
or
modified
in
any
way
without
permission.
602

---