6 skin_renewal2007mod_nxpowerlite_

6 skin_renewal2007mod_nxpowerlite_ - Skin (Epithelial cell...

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Skin (Epithelial cell renewal) th Dr. Kelly Selman August 29, 2007
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Epithelia All internal and external surfaces of the body are covered by sheets of epithelial cells Mesothelium: a simple squamous epithelium lines the walls and covers the contents of all the closed cavities of the body (abdominal, pericardial and pleural cavities) Endothelium: All glands are made of epithelia An epithelium lines the ducts The cells of the secretory units are epithelial cells Classification of glands
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Formation of glands CT CT CT (Acinus or tube)
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Unicellular gland Small intestine Goblet cell M Nucleus PAS H&E
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Multicellular glands
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Serous and mucus cells Serous cells Mucous cells Submandibular gland
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Modes of Secretions Pancreas Mammary gland Sebaceous gland Merocrine Apocrine Holocrine
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Overview of skin Skin is the heaviest organ in the body Functions: Protective barrier (abrasion, invasion, uv. ..) Thermoregulation (sweat glands, dilation of blood vessels) Waterproofing Sensory (receptors) Synthetic (Vitamin D 3 ) Structure reflects functions
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Organization of skin “Superficial fascia” (Subcutaneous) Dermis Hypodermis Epidermis (Epithelial compartment) Sweat glands Pacinian corpuscles Blood vessels Duct Adipose tissue (CT compartment)
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This note was uploaded on 01/04/2012 for the course ANT 610C taught by Professor Johnaris during the Spring '10 term at University of Florida.

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6 skin_renewal2007mod_nxpowerlite_ - Skin (Epithelial cell...

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