Page 139 - Atlas of Histology with Functional Correlations

FIGURE 4.10 ■ Stratified squamous nonkeratinized epithelium: esophagus.
Stain: hematoxylin and eosin. Medium magnification.

FIGURE 4.11 | Stratified Squamous Keratinized

Epithelium: Palm of the Hand

The skin is covered with stratified squamous keratinized epithelium (1). The
outermost layer of the skin contains dead cells and is called the stratum

corneum (5). In the palms and soles, the stratum corneum (5) is thick, whereas
in the rest of the body, it is thinner. Inferior to the stratum corneum (5) are the
different cell layers that give rise to the stratum corneum (5).

This medium-power photomicrograph illustrates the stratified squamous
keratinized epithelium (1) of the palm and the cell layers stratum granulosum

(6) and stratum spinosum (7) as well as the basal cell layer, stratum basale (8).
The epithelium is attached to the underlying connective tissue (3) layer
composed of dense collagen fibers and fibroblasts. The underlying surface of the
epithelium (1) is indented by connective tissue (3) extensions called papillae (2)

that form the characteristic wavy boundary between the epithelium (1) and the
connective tissue (3). Passing through the connective tissue (3) and the
epithelium (1) are excretory ducts of the sweat glands (4) that are located deep
to the epithelium.

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