PPT-Diseases of the Epidermis and Dermis

By Hussein Al Naji PITYRIASIS Pityriasis scales are accumulations of keratinized epithelial cells sometimes softened ampmade greasy by the exudation of serum or sebum Primary pityriasis. 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 13 The dermis is approximately 15 to 40 times as thick as the epidermis It consists of three layers Papillary layer The dermal area that projects into the intervals between the epidermal ridges The fiber components are thin and richly supplied wit 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 . Introduction to the SKIN! . Integumentary System . Skin (aka- . cutaneous. membrane). Nails. Hair Follicles. Skin Glands. The skin is the largest organ by weight. Functions. :. Protective covering. Slows water loss. Dr . Ali elethawi. Specialist dermatologist . C.A.B.D ,F .I .C.M.S .  . The integumentary system is synonymous with. : . . The skin and its appendages . : . sweat glands, nails, hair, sebaceous glands & arrector pili muscles. . 19. 2018. What do you already know about the integumentary system?. Integumentary System. Components. :. Skin (aka . cutaneous membrane . or . integument. ). Hair. Nails. Integumentary System. Components. 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. Chapter 6: Integumentary System I. Introduction A. Introduction 1 . The skin is composed of several kinds of tissues. 2. Skin is a protective covering that prevents many harmful substances from entering the body. Chapter 6: Integumentary System I. Introduction A. Introduction 1 . The skin is composed of several kinds of tissues. 2. Skin is a protective covering that prevents many harmful substances from entering the body. 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:. pl Dermatitides Inflammation of the skin The term eczema also refers to an inflammation of the skin The term eczema is often colloquially used to define the disease atopic dermatitis Descriptive ter Dermis. Stratum Corneum. Stratum Lucidum. Stratum Granulosum. Stratum Spinosum. Stratum Basale. C= stratum corneum. G= stratum granulosum. S= stratum spinosum. B= stratum basale. Stratum Spinosum. Thick Skin. The thickness of the epidermis is varies according to the region of the body, reaching maximum thickness about 4mm in the back. Dermis contain two layers the outermost . papillary layer. and deeper . dr. Ahmed Almusawi 1 DERMIS The dermis is the layer of connective tissue that supports the epidermis and binds it to the subcutaneous tissue (hypodermis). The thickness of the dermis varies with the