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[UNIT 4 – INTEGUMENTARY SYSTEM]Anatomy Notes OutlineI.Components of Skina.Membraneb.Accessory Structures--Accessorystructures of the skin include hair,nails,sweat glands, andsebaceous glandsII.Functions of the Integumenta.protectionb.absorptionc.excretiond.secretione.regulationIII.Divisions of the Skina.Epidermis--made of closely packed epithelial cellb.Dermis--irregular connective tissue that houses blood vessels, hair follicles, sweatglands, and other structures.c.Hypodermis--epidermal layer of cells that secretes the chitinous cuticle.1
[UNIT 4 – INTEGUMENTARY SYSTEM]Anatomy Notes OutlineIV.Epidermisa.TypesThick Skin--- “Thick skin” is foundonly on the palms of the hands and the soles of the feet. It has a fifth layer, called the stratumlucidum, located between thestratum corneum and the stratum granulosumThin Skin-- Skin that has four layers of cells is referred to as “thin skin.” From deep to superficial,these layers are the stratum basale, stratumspinosum, stratum granulosum, and stratum corneum. Most of the skin can be classified as thin skinb.Direction of Growth—bottom to topStratum--is the outer layer of theskinV.Layers of the EpidermisStratum Basale-- the deepest epidermal layer and attaches the epidermis to thebasal lamina, below which lie the layers of the dermisi.Epidermal Ridges -are formed when theepidermisadapts to the contours of thedermal papillae that is underneath theepidermis.Stratum Spinosum-- layer of the epidermis superficial to the stratum basale, characterized by thepresence ofdesmosomesb.Stratum Granulosum--layer of the epidermis superficial to the stratum spinosumi.Keratin –type of structural protein that gives skin, hair, and nails its hard, water-resistant propertiesStratum Lucidum-- layer of the epidermis between the stratum granulosum and stratum corneum,found only in thickskin covering the palms, soles of the feet, and digitsc.Stratum Corneum--most superficial layer of the epidermisi.Turnover Rate—approximately 20 days2
[UNIT 4 – INTEGUMENTARY SYSTEM]Anatomy Notes Outlineii.Dust – they are typically found in dustVI.Psoriasis---

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Term
Spring
Professor
mr. Rashid
Tags
Stratum Corneum, Stratum Granulosum

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