Introduction, Organization & Integumentary System

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ANT250 I L - Anatomy and Physiology I L Module 1 - Case Introduction, Organization & Integumentary System HM3 (SW/AW) Alexander Franco Dr. Terry Else Case Assignment- For this first case assignment, I want you to describe, in a 2 to 3 page paper—the process by which the skin renews itself. Specifically, I want you to discuss: 1. How skin cells are formed 2. Stages of skin cell maturation (that is, how they “grow”); 3. How skin cells die. As the body’s largest organ, the skin serves many protective and regulatory functions. Protection of this vital organ is paramount to the promotion and maintenance of health as well as thermoregulation, sensation and body image. Our skin is an important organ whose diverse functions are not always appreciated. It is the interface between the body and the rest of the world. It shields us from harmful organisms and protects us from physical and mechanical injury. “Skin accounts for 10-15% body mass which is about 6-8 lbs and covers more than 20 square feet. Our Skin has a ph balance of 4.0-6.5, this acid mantle helps regulate normal skin flora which acts as a barrier to bacteria, other micro organisms and infections.” (Baranoski, S. Ayello, E., and Tomic-Canic, M. 2008). Skin has a thickness of 0.5mm-6mm, it is thickest on our hands and soles of the feet and thinnest at our eyelids. It is comprised of three layers the Dermis, Epidermis and hypodermis. Even though you can't see anything happening your epidermis is hard at work. At the bottom of the epidermis new skin cells are forming. When the cells are ready, they start moving toward the top of your epidermis. “This trip takes about 2-4 weeks.” Farabee, M. J. (2007). As newer cells continue to move up, older cells near the top die and rise to the surface of your skin. What you see on your hands and

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