The skin is divided into two layers: the epidermis and the dermis. epidermis. What are the basic functions of each of these layers? Stratum basale 5. The papillary layer is made of loose, areolar connective tissue, which means the collagen and elastin fibers of this layer form a loose mesh. “Thick skin” is found only on the palms of the hands and the soles of the feet. The stratum lucidum is a smooth, seemingly translucent layer of the epidermis located just above the stratum granulosum and below the stratum corneum. The reticular layer appears reticulated (net-like) due to a tight meshwork of fibers. The epidermis is the very top level that we all touch everyday. Also, oxygenated hemoglobin can give the skin a pink hue in lighter-skinned inviduals. Below the dermis is the hypodermis layer. The Integumentary System. What is the significance of the hypodermis? In much of the developed world, insufficient exercise coupled with the ready availability and consumption of high-calorie foods have resulted in unwanted accumulations of adipose tissue in many people. Watch this video to learn about the challenges these children and their family face. The hypodermis (subcutaneous layer, or superficial fascia) lies between the dermis and underlying tissues and organs. It shields the body from the environment, and it contains sensory receptors (part of the nervous system) that detect warmth, cold, pressure and pain. 3. The Integumentary System . The hypodermis attaches the skin to underlying bones and muscles. What are the functions of each? With aging, the volume of facial fat decreases and there is less supportive tissue to support the normal turgor and elasticity of the skin. Each organ has its jobs in this system but all together helps protect out body from physical damage and etc. The stratum granulosum has a grainy appearance due to further changes to the keratinocytes as they are pushed from the stratum spinosum. What are other things you consider as physiological needs? The hypodermis is technically not part of the integumentary system. Albinism is a genetic disorder that affects (completely or partially) the coloring of skin, hair, and eyes. 2. When there is bright light, the iris closes the pupil to let in less light. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for the integument. Match these terms with the Fat correct statement or definition: Hypodermis 1. The keratinocytes in the stratum spinosum begin the synthesis of keratin and release a water-repelling glycolipid that helps prevent water loss from the body, making the skin relatively waterproof. Where is the blood supply for the skin? Adipocytes swell … Hypodermis 4. Correspondingly, is the Hypodermis part of the integumentary system? A highly contagious fungal infection of the skin that usually resembles a ring. Sometimes called subcutaneous tissue. to explore the tissue sample in greater detail. The dermis is mostly formed of connective tissue having fibro-blasts, adipose cells and macrophages. http://virtualslides.med.umich.edu/Histology/EMsmallCharts/3%20Image%20Scope%20finals/065%20-%20Epidermis_001.svs/view.apml, http://openstaxcollege.org/files/textbook_version/low_res_pdf/13/col11496-lr.pdf, Describe the integumentary system and the role it plays in homeostasis, Describe the layers of the skin and the functions of each layer, Describe the accessory structures of the skin and the functions of each, Describe the changes that occur in the integumentary system during the aging process, Discuss several common diseases, disorders, and injuries that affect the integumentary system, Explain treatments for some common diseases, disorders, and injuries of the integumentary system, Identify the components of the integumentary system, Identify and describe the hypodermis and deep fascia, Describe the role of keratinocytes and their life cycle, Describe the role of melanocytes in skin pigmentation. The integumentary system is A. Papillary, reticular made of what two layers? Services. Not only is this a problem for the individuals affected, but it also has a severe impact on our healthcare system. What is an oil or sebaceous gland? Identify the layers of the skin. Integumentary System DRAFT. The epidermis of the skin provides protection against abrasion, ultraviolet light, and water loss, and produces vitamin D. The dermis provides structural strength and contains blood vessels involved in temperature regulation. The skin is attached to underlying tissue by the hypodermis, which is a major site of fat storage. A finger-like projection, or fold, known as the dermal papilla (plural = dermal papillae) is found in the superficial portion of the dermis. This increased melanin accumulation protects the DNA of epidermal cells from UV ray damage and the breakdown of folic acid, a nutrient necessary for our health and well-being. Lipid Storage. They also tend to be more sensitive to light and have vision problems due to the lack of pigmentation on the retinal wall. What part of the integumentary system sends and receives messages? It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. In humans, the primary organ of the integumentary system is the skin. This happens when the oxygen supply is restricted, as when someone is experiencing difficulty in breathing because of asthma or a heart attack. A sudden drop in oxygenation can affect skin color, causing the skin to initially turn ashen (white). Science Olympiad - Anatomy Learn with flashcards, games, and more — for free. Neither albinism nor vitiligo directly affects the lifespan of an individual. It includes the skin, hair, exocrine glands, and nails. The ... it is not considered as part of the skin, it is a layer of loose connective tissue rich in fat cells. Fat distribution changes as our bodies mature and age. This is the fatty layer that anchors the skin to your body. The cells (three to five layers deep) become flatter, their cell membranes thicken, and they generate large amounts of the proteins keratin, which is fibrous, and keratohyalin, which accumulates as lamellar granules within the cells (see Figure 5.5). Skin is the body’s largest organ and it functions as part of the integumentary system, which works to protect the body from different kinds of damage. 1. The epidermis of the skin provides protection against abrasion, ultraviolet light, and water loss, and produces vitamin D. The dermis provides structural strength and contains blood vessels involved in temperature regulation. INTEGUMENTARY SYSTEM. Cosmetic procedures, such as microdermabrasion, help remove some of the dry, upper layer and aim to keep the skin looking “fresh” and healthy. - Function & How Muscles Work in Groups, Praxis Family & Consumer Sciences (5122): Practice & Study Guide, TExES Health EC-12 (157): Practice & Study Guide, ILTS Health Education (211): Test Practice and Study Guide, GACE Health Education (613): Practice & Study Guide, CSET Health Science Subtest I (178): Practice & Study Guide, CSET Health Science Subtest II (179): Practice & Study Guide, CSET Health Science Subtest III (180): Practice & Study Guide, First Aid & CPR Training for Health Professionals, Health 301: Ethical & Legal Issues in Healthcare, Health 310: Human Resource Management in Healthcare, Health 308: Healthcare Quality & Outcome Measurement, Health 305: Healthcare Finance & Budgeting, Biological and Biomedical 100. It is also known as the subcutaneous layer or subcutaneous tissue. 3. Integumentary system. Question: Part C: Ch. Fingerprints are unique to each individual and are used for forensic analyses because the patterns do not change with the growth and aging processes. The accumulation of melanin in keratinocytes results in the darkening of the skin, or a tan. Subcutaneous tissue binds the skin to underlying structures. Tags: Topics: Question 3 . The hypodermis is the deepest lying part of the skin and helps in insulation of the body as well as protects the internal organs. The Hypodermis and Aging . The hypodermis is home to most of the fat that concerns people when they are trying to keep their weight under control. For now, though, you learned all about skin, the main organ of your integumentary system. It forms the external covering of the body and 15-20% of it's mass. The hypodermis, otherwise known as the subcutaneous layer, is a layer beneath the skin. 0. It serves as afoundation to the Dermis and Epidermis and is attached to the underlying bond andmuscle of the body. The male sex hormone is produced where? Keratin is an intracellular fibrous protein that gives hair, nails, and skin their hardness and water-resistant properties. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for the integument. Yes, the hypodermis is part of the integumentary system. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for the integument. It also functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature. Most of the skin can be classified as thin skin. The stratum basale (also called the stratum germinativum) is the deepest epidermal layer and attaches the epidermis to the basal lamina, below which lie the layers of the dermis. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from the deeper layers (Figure 5.4). TheHypodermis is not part of the skin but is part of theintegumentary system. Name three accessory structuresB. The integumentary system is an organ system that protects the human body from pathogens, damage and water loss. http://virtualslides.med_umich.edu/Histology/Basic%20Tissues/Epithelium%20and%20CT/106_HISTO_40X.svs/view.apml? Match these terms with the Fat correct statement or definition: Hypodermis 1. What are the two types of skin that cover the human body? Too much sun exposure can eventually lead to wrinkling due to the destruction of the cellular structure of the skin, and in severe cases, can cause sufficient DNA damage to result in skin cancer. The integumentary system consists of the largest organ in the body: the skin. 5 The Integumentary System FOCUS: The integumentary system consists of the skin, hair, nails, and a variety of glands. Played 242 times. The Integumentary System . This layer is well vascularized and has a rich sensory and sympathetic nerve supply. It has a fifth layer, called the stratum lucidum, located between the stratum corneum and the stratum granulosum (Figure 5.3). It is also known as the subcutaneous layer or subcutaneous tissue. Integumentary Exam Review 1. The layers of the skin are organized into the outermost epidermis and the underlying dermis.Beneath the dermis is a structure called the hypodermis or subcutaneous layer, although it is not a true part of the skin ().The junction of the epidermis and dermis is reticular, with an individualized pattern that forms dermatoglyphs, or the fingerprints and footprints, of the hands and feet. 4. Nails. It protects internal structures, prevents the entry of infectious agents, reduces water loss, regulates body temperature, produces vitamin D … Interspersed among the keratinocytes of this layer is a type of dendritic cell called the Langerhans cell, which functions as a macrophage by engulfing bacteria, foreign particles, and damaged cells that occur in this layer. Similarly, Addison’s disease can stimulate the release of excess amounts of adrenocorticotropic hormone (ACTH), which can give the skin a deep bronze color. Treatment of this disorder usually involves addressing the symptoms, such as limiting UV light exposure to the skin and eyes. It supplies blood vessels and nerves to the skin. Individuals with albinism tend to appear white or very pale due to the lack of melanin in their skin and hair. Answer: The integumentary system covers the surface of the body is true about the integumentry system. 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