Epithelium stratified

Mouth Posterior epithelium Stratified squamous Descemet s membrane Controls fluid transport... 

In the squamous/stratified epithelium covering, the palatal aperture of the N-P canals and the dorso-lateral surfaces of the papilla, there are occasional clusters of taste buds. These non-olfactory chemosensory elements are positioned at or near to the entrance to the AOS, suggesting that some initial chemosensation may arise from the sampling of material... 

The outermost layer, the epithelium, is composed of five to seven layers of stratified epithelial cells that makeup only 10% (50 pm) of the total corneal... 

The corneal epithelium is a stratified squamous epithelium like the epidermis of the skin but is nonkeratinized like other mucosal epithelia such as the intestinal and airway epithelia. Although the corneal epithelium, five to seven cells thick, represents less than 10% of the entire corneal thickness, it provides as much as 99% resistance to the diffusion of small electrolytes such as Na+ and Cl [55-57],... 

The mouth is the region from the lips to the pharynx. The first step in the digestive process is chewing, or mastication, which is an initial mechanical breakdown of the food that facilitates its movement to the stomach. The mouth is lined with stratified squamous epithelium that provides extra protection from injury by coarse food materials. Three pairs of salivary glands secrete saliva into the oral cavity ... 

The epithehal cell layer forms the major barrier to absorption of drug molecules. In the large airways stratified epithehum occurs, whereas in the alveoh the epithelium is only one cell layer thick. 

All rats survived dermal doses of up to 60 mg/rat administered over 13 weeks. Mean body weights were up to 14% lower than controls, and redness, scabs, and ulceration occurred at the application site. In mice, applications of up to lOmg/mouse produced increased liver and kidney weights. Compound-related skin lesions included sebaceous gland hyperplasia and hyperplasia and hyperkeratosis of the stratified squamous epithelium at the site of application ovarian atrophy was also considered to be compound related. 

Slaughter DP, Southwick HW, Smejkal W. Field cancerization in oral stratified squamous epithelium clinical implications of multicentric origin. Cancer 1953 6 963. 

The skin consists of two main compartments, the epidermis, a stratified squamous epithelium, and the underlying dermis, a richly vascularized tissue embedded in a connective tissue matrix (Fig. 41.1). The epidermis consists of multiple layers of keratinocytes, which differentiate into the outermost layer, the stratum corneum. This layer contains the hydrophilic structural... 

The comeal epithelium is made of stratified and keratinless scale-like and junction-like cells. These cells are arranged on 4-6 layers at the central part and 4-8 layers on the edge of the cornea. Their combined thickness is about 50-60 pm representing about 10% of the whole thickness of the cornea. The structure and function of the epithelium strictly depends on the lacrymal secretion that covers it and plays a big part in the preservation of the cells and in their transparency. 

The lining of the vestibule, which contains a zone of short stiff hairs (vibrissae), acts as a baffle system for filtering out large (>10 pm) airborne particles. The stratified squamous epithelium of the vestibule is resistant to dehydration and inhaled irritants and poorly permeable. Between the vestibule and atrium, there is a constriction known as the internal... 

The superficial epithelial layer of the conjunctiva is continuous with the corneal epithelium and stretches over the conjunctival sacs toward the epidermis of the lids. The stratified epithelium varies in thickness from two to four layers at the junction with eyelid margin skin, to six to eight layers at the junction with corneal epithelium [15], The substantia propria of the conjunctiva is divided into two layers, a superficial lymphoid layer and a deeper fibrous layer. The deeper fibrous layer consists of thick, collagenous, elastic tissue that is rich with vessels [15]. 

Stratified squamous to mucociliated epithelium with olfactory cells Mucociliated epithelium (ciliated, mucous cells, basal cells) smooth muscle cells fibroblasts neuroendocrine cells immune cells Mucociliated epithelium with Clara cells in distal bronchioles and alveolar ducts... 

Makhno, T. et al. Expression of hornerin in stratified squamous epithelium in the mouse a comparative analysis with profilaggrin, J. Histochem. Cytochem., 51,485, 2003. 

The oral mucosa provides a protective covering for underlying tissues while acting as a barrier to the entry of microorganisms and toxins. Histologically, the stratified squamous epithelium lining the oral cavity exhibits a diverse structure as well as important inter-species differences. This... 

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