CH 4: Epithelium Function and Example Locations

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Mostly from figure 4.3 (pages 72-75) Human Anatomy (5th ed.) Marrieb, Mallatt, Wilhelm

Protection, Absorption, Sensation, Secretion, Ion Transport, Filtration of Fluids, Slippery Surfaces

These are some of the main functions of Epithelia (PASSIFS)

Protection

All stratified epithelium (squamous, cuboidal, columnar, transitional) serve this purpose

Simple Squamous

____ ____ Epithelium:This single layer tissue type is most often involved in diffusion and filtration. Example Location: Kidney glomeruli, air sacs of the lungs, etc.

Simple Squamous

____ ____ Epithelium: This single layer tissue is responsible for secretion in serous membranes

Simple Cuboidal, Simple Columnar

____ ____ Epithelium; ____ ____ Epithelium: These two single layer tissues are thin enough to allow a large number of molecules to pass through, yet thick enough to house cellular machinery for molecular transport - functioning in the active movement of molecules, absorption, secretion, and ion transport

Simple Cuboidal

____ ____ Epithelium: An example of this single layer tissue can be found in kidney tubules.

Simple Columnar

____ ____ Epithelium: An example of this single layer tissue can be found in the digestive tract - tissue in this tract tend to be nonciliated.

Pseudostratified Columnar

____ ____ Epithelium: This single layer tissue is involved with mucus secretion and propulsion of mucus by ciliary action in the trachea (wind-pipe).

Stratified Squamous, Epidermis

____ ____ Epithelium: An example of this multi-layer tissue is found in the ____, where the apical cells are fully keratinized (and are dead and dry).

Stratified Cuboidal

____ ____ Epithelium: An example of this multi-layer tissue is found in the largest ducts of the salivary glands (oral region).

Stratified Columnar, Urethra

____ ____ Epithelium: An example of this multi-layer tissue is found in the male ____ (genital region). This tissue is rare in the body.

Transitional Epithelium, Urinary

____ ____: Among other functions, this multi-layer tissue stretches to accomodate distension of _____ structures.

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