PPT-The Epidermis

Keratinization is the process of replacing viable cells in the stratum basale with more and more of the waxy keratin protein as cells move from the deepest layer to the surface layer Constant friction can stimulate the process and produce a callus an even thicker buildup of keratinocytes in the stratum . brPage 3br Mechanoreceptors Merkel receptor diskshaped receptor located near the border betwe en the epidermis and dermis Meissner corpuscle stack of flattened disks in the dermis just below epidermis Ruffini cylinder branched fibers inside a cyl Integumentary System. First line of defense. Structure – classified as a membrane. Epidermis – epithelial layer. Dermis – vascular connective tissue. Subcutaneous layer – loose – collagen + adipose. Leaf structure. The leaf has three main sections to it.. Cuticle.. Epidermis.. Mesophyll.. Cuticle. Epidermis. Palisade mesophyll. Spongy mesophyll. Epidermis. Cuticle. The cuticle:. Consists of a waxy material which improves impermeability. It is produced by the epidermis cells.. Lab 14. The Leaves. The . Leaves. are lateral outgrowth of the stem which develop from the meristematic tissues . .. Functions . of Plant . Leaves. Photosynthesis. Transpiration. The exit of water is through the . Lab Make-up . Lower epidermis (field one . and two. Upper epidermis. . Graad. 10. J. Oliphant. 2. . Permanente . Weefsel. Weefsel. . wat. reeds . gedifferensieer. is om ‘n . bepaalde. . funksie. . te. . verrig. .. 2. . Permanente . Weefsel. Daar. is 5 . subgroepe. Part 1:. Integumentary System. The . integumentary. system consists of the . skin. , . hair. , . nails. , and . glands. .. . Functions. : . protection of internal structures (from abrasion & UV light). I. The Integumentary System. The Integumentary System. Skin = Integument. Largest organ in body – 15% of body weight. Skin accessory organs . (hair, nails, glands) . . . = Integumentary system. Integumentary System. Skin. Hair. Nails. Associated Structures (vessels, nerves, glands). Membranes. Epithelial membranes. Cutaneous. Mucous. Serous . Parietal vs visceral. Pleura, pericardium, peritoneum. Part 1:. Integumentary System. The . integumentary. system consists of the . skin. , . hair. , . nails. , and . glands. .. . Functions. : . protection of internal structures (from abrasion & UV light). Anatomy & Physiology. ivyanatomy.com. . Skin and Its Tissues. An . Organ . is composed of two or more tissues. Skin (Cutaneous Membrane) . is the largest organ by weight. Two Layers of Skin include:. Dr.Widad.J.H. INTEGUMENTARY SYSTEM . . .. The skin . (also known as cutis ) . covers the entire outer surface of the body. Structurally, the skin consists of two layers which differ in function, histological appearance and their embryological origin. The outer layer or epidermis is formed by an epithelium and is of . DR SK MIREMBE. Terminology . Primary lesions . Flat. Macule. -flat circumscribed skin discoloration it lacks surface or elevation or depression . eg. . Café au . lait. , . vitiligo. , freckle, . junctional. (Integumentum commune) = Skin and accessory structures Aleš Hampl Integumentum commune = Body coverage Tela subcutanea = Subcutis - Hypodermis Cutis = Skin Epidermis = keratinizing stratified