PDF-The Dermis

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. 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 Ressetar. Epidermis. Dermis. Stratum Corneum. Stratum Lucidum. Stratum Granulosum. Stratum Spinosum. Stratum Basale. C= stratum corneum. G= stratum granulosum. S= stratum spinosum. B= stratum basale. 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. . Dermis: middle layer. A. Tissue . Type. Tissue: . Dense Irregular Connective Tissue. Contains: . Collagen. Fibers: Strong and resist stretching but can bend. Elastic. Fibers: allow stretching but also recoil back. 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:. 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 . papillary dermis. s. weat duct. hypodermis. s. weat glands. s. weat duct. melanocyte. Melanocytes & Langerhans Cells. melanocytes. Langerhans cells. sb. sp. sg. sc. Slide 0059: Lip. o. rbicularis . Knowledge of the structure, functions and conditions of the skin, are . essentials for understanding how to optimally serve our clients at every level. Did you know…. The skin is the body’s largest organ.