The skin is the largest organ in the body, comprising about 15% of body weight. Structure and functions of the skin online medical library. The skin consists of three main layers epidermis, dermis and subcutaneous tissue. Appocrine sweat glands are coiled tubular glands with myoepithelial cells, with larger lumens and a proteinaceous secretion.
Structure and function of the skin msd manual consumer version. Skin proliferation, sustenance of the skin, skin appendages hair and nails, skin color, diseases of the skin. Jan 23, 2020 this article offers a compact overview of the body. Cross section of human skin showing the stratum corneum layer of the epidermis. These functions of skin tend to vary in degrees according to age, race, gender and individual. Lss the skin alexandra burkesmith 1 introduction to the skin the skin 1 prof tony chu t.
View skin problems such as sun burn, skin cancer and acne. The largest organ of the human body, the skin, has a major role in providing a barrier. Ages were revealed by immunofluorescence in human skin. Files are available under licenses specified on their description page. As such, it creates a barrier between the body and the external environment and protects the body against excessive. Al di sotto delle rughe, le sottili fibre terminali, generalmente numerose in qualsiasi altra parte del corpo, sono diradate. Jun 16, 2011 a lesson on basic skin structure for cosmetology students.
In terms of chemical composition the skin is about 70% water, 25% protein and 2% lipids. When you inhale dust, you also inhale dead human skin cells. Drawing upon the accumulated data derived from embryology, histology, anatomy, physiology, biochemistry, and pharmacology, this book presents an overview of skin, with emphasis on human skin. Human body structures and functions human body structures and functions is a onecredit course designed to help students develop a basic knowledge of the normal structure and function of the human body.
The skin is divided into several layers, as shown in fig 1. The primary function of the skin is to act as a barrier against unwanted influences from the environment. Its other functions are insulation, temperature regulation, sensation, synthesis of vitamin d, and the protection of vitamin b folates. The skin in humans serves other functions such as the synthesis of vitamin d. These cells have protective function and form a first line of defense in the body against pathogens and antigenic materials. In direct contact with the outside environment, the skin helps to maintain four essential bodily functions.
Get a printable copy pdf file of the complete article 116k, or click on a page image below to browse page by page. It keeps the internal environment of our body stable. In addition, there is a full medical terminology included tables for all the essential skin terms. Webmd s skin anatomy page provides a detailed image of the skin and its parts as well as a medical definition. Lss the skin alexandra burkesmith introduction to the skin. The barrier function of the skin is located in the superficial of the skin, the stratum.
Renewal of the skin barrier through the unique process of exfoliation is described. In this chapter, we describe the structural properties of human skin, its functions, and the basic principles of drug penetration. If you continue browsing the site, you agree to the use of cookies on this website. A tissue is a group of similar cells working together. The epidermis is composed of the stratum corneum and the viable epidermis. The total skin surface of an adult ranges from 1220 square feet. The epidermis consists of multiple layers and cells.
Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Furthermore, human skin acts as an organ of attraction between individuals. Also the skin epithelium has other cellular types that include cells of immunological origin. It is a waterproof, airtight and flexible barrier between the environment and internal organs.
They function in response to heat stress in thin skin and in excretion. The ducts open into the upper part of hair follicles and begin secretion after. Structure and functions of the skin see online here the skin forms part of the bodys integumentary system. It is soft, to allow movement, but still tough enough to resist breaking or tearing. All structured data from the file and property namespaces is available under the creative commons cc0 license. Full text full text is available as a scanned copy of the original print version. The skin is the bodys largest organ and weighs between 3 and 10 kg 820 pounds. Skin layer mechanics the human skin is composed of several layers, each with an unique structure and function.
The structure of the human skin barrier springerlink. Human skin is a uniquely engineered organ covering the body. The stratum corneum consists of dead cells filled with keratin and water, which are embedded in. They originate from cells in the deepest layer of the epidermis called the basal layer. Knowledge about the mechanical behavior of these skin layers is important for clinical and cosmetic research, such as the development of personal care products and the understanding of skin diseases. Pigs as dermatologic models of human skin disease pdf. The structure and function of skin 3rd edition by william montagna author visit amazons william montagna page. This document will teach all the essentials your students need to know about skin, including the structure of the skin layers, the function of skin, and common diseases and conditions that affect the skin. Course one describes the structure and function of the skin barrier, including its role in the bodys immune processes. The skin is the largest organ of the body when we consider both the interior and the surface of the body. The integumentary system is formed by the skin and its derivative structures see figure 11. Enter your username and well send you a link to change your password.
Structure, function and medical terminology of the skin by. As yucky as that might sound, the keratinocytes do play a lot of important roles. Negroid or mongoloid skin have higher lightprotection ability than caucasian skin. What are the layers of skin in order and their functions. The structure and function of skin, third edition is devoted to all matters pertaining to the structure and function of the skin. Sep 08, 2018 study the types of cells in the skin of humans. Beneath the surface of the skin are nerves, nerve endings, glands, hair follicles, and blood vessels. Some of the same organs even belong to more than one system.
Dendriticlangerhans cells function in immune response. The outermost level, the epidermis, consists of a specific constellation of cells known as keratinocytes, which function to synthesize. The epidermis is the outermost layer of the skin with. The major theme is the interaction between and dependence of the integrity of skin on, cell turnover, nutrition, control mechanisms and disease.
Class search structure and function of the human body quizlet. Forslind b, engstrom s, engblom j, norlen l 1997 a novel approach to the understanding of human skin barrier function. Al di sotto delle rughe sia le fibre di collagene che quelle elastiche sono compatte e sono orientate ad angolo retto rispetto alla ruga stessa figure 2, 4. The barrier function of the skin is located in the superficial of the skin, the stratum corneum.
The human skin is the outer covering of the body and is the largest organ of the integumentary. Most of the cells in the epidermis are keratinocytes. Sweat pores fed by sweat glands open to the cristae cutis arrows. The epidermis is the relatively thin, tough, outer layer of the skin. Being the largest organ, the skin provides around 16% of the body mass of an average person, and it covers an average area of 1. Structure and function of human skin fudan university. Like malassezia species, demodex mites favor lipids of the sebum. From slice to scab, a tabloidsized pdf file for printing and display in your classroom. The skin is the human bodys its largest organ, covering.
If you stretched it out flat it would measure between 11 and 18 square meters and account for 12 percent of your total body weight. The skin comprises 15% of the total adult body weight. They are all interconnected and dependent on each other. The course uses an integrated approach for teaching medical terminology to the health care student by incorporating medical terminology into. A diagrammatic representation of the structure of human skin in cross section. Demodex folliculorum is found in hair follicles in clusters with other mites of the same species. Learn about the skin s function and conditions that may affect the skin.
This page was last edited on 31 august 2016, at 08. How to study the structure and function of human skin. Our skin is a good indicator of our general health. The skin is an organ that provides the outer protective wrapping for all the body parts. An organ is a structure containing multiple tissues and performing a specific function or sometimes several functions. Kolarsick, bs, maria ann kolarsick, msn, arnpc, and carolyn goodwin, aprnbc, fnp chapter 1 introduction the skin is the largest organ of the body, accounting for about 15% of the total adult body weight. Browse 500 structure and function of the human body classes. Quizlet is a lightning fast way to learn vocabulary. It performs many vital functions, including protection against external physical.
The second misconception is that the human body systems exist as separate entities. See how the skin is involved in the regulation of body temperature. Located on the outermost layer covering a living body. Jan 21, 2010 how skin is nourished blood and lymph supply nourishment to skin contribute essential materials for growth, nourishment, and repair of skin subcutaneous arteries and lymphatics send smaller branches to hair follicles, skin glands, hair papillae skin breathes by taking in oxygen and discharging carbon dioxide 11. Skin is 6mm thick on the soles of your feet and only 0. The appearance of the skin and hair is the first image that others have of us. The structural architecture of skin and the important molecules that maintain this structure are also included in this course section. Personal expression changes with variations in the condition of our hair and skin, whose appearance is derived from their intrinsic wellbeing. Other eukaryotes that colonize the human skin belong to the phylum arthropoda.
You will receive your score and answers at the end. Epidermis the epidermis is the relatively thin, tough, outer layer of the skin. Skin structure and function george rogers learning objectives this topic should provide you with. Structure and function of the human skin microbiome. It is also the largest organ of the human body, providing around 10% of the body mass of. Skin layer mechanics technische universiteit eindhoven. In direct contact with the outside environment, the skin helps to maintain four. Publishers pdf, also known as version of record includes final page.
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