The human skin (integument) is composed of a minimum of two major layers of tissue: the epidermis and dermis. Hair is composed of three layers. The skin consists of two distinct layers: a thinner outer layer called the epidermis, and a thi cker inner layer called … Answer: Hair, sweat, oil glands, skin. Create your account. The hair matrix surrounds the bottom of the hair shaft where it is embedded within the hair bulb. The hair shaft, in itself, contains three layers: the outermost cuticle, a middle layer called the cortex, and an innermost layer called the medulla. keloid: type of scar that has layers raised above the skin surface The Integumentary System. 3. The Integumentary System: The Dermal Layer 8:49 What's the outer-most layer of your skin called? The skin is very important organ; it forms the protective covering for our body. Answer: 3 Layers 4. The epidermisis composed of keratinized, stratified squamous epithelium. The Integumentary System: The integumentary system is a major organ system of the body, and it functions to protect the body from the external world. answer! The integumentary system includes hair, scales, feathers, hooves, and nails.It has a variety of additional functions; it may serve to waterproof, and protect the deeper tissues, excrete … internal root sheath: innermost layer of keratinocytes in the hair follicle that surround the hair root up to the hair shaft. integumentary system: skin and its accessory structures. Ch 5 - The Integumentary System intellectual challenge SKIN STRUCTURE Skin is made up of 3 layers. The dermis is the middle layer of the integumentary system, lying directly below the stratum basale of the epidermis. Thin outer membrane layer, and composed of stratified squamos epithelium: Dermis: Middle, fibrous connective tissue layer, and composed of collagen fibers (also known as "corium") Subcutaneous Layer: Innermost layer of fatty tissue and fat cells called lipocytes (also known as "fascia" or "hypodermis") What is the Basal layer? Some people choose to embellish … List the 3 layers of the skin and what structures are located in them. The middle layer of skin, the dermis, contains blood vessels, nerves, and glands that are important for our skin’s function. Skin is the largest organ of the body. © copyright 2003-2021 Study.com. SURVEY . In humans, the integumentary system consists of the skin, nails, hair, and exocrine glands. Skin: The largest organ of the body that covers the entire body; The epidermis: The outermost layer of the skin that contains keratin and squamous epithelial cells; The dermis: The middle layer of the skin which gives the skin its elasticity and its ability to stretch Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. What is the outer layer called? How much does the INTEGUMENTARY System weigh/what percetage of the body's weight? the middle layer of your skin. The integumentary system protects against many threats such as infection, desiccation, abrasion, chemical assault, and radiation damage. 20lbs or 16% of the body's total weight. The middle layer is the cortex. The integumentary system consists of the skin, the feathers and the appendages (claws and beak). epidermis: outer layer of skin that consists almost entirely of epithelial cells and contains no skin structures except melanocytes hair follicle: structure in the dermis, or lower layer of the skin, where a hair originates integumentary system: human body system that includes the skin, hair, and nails The integumentary system is very important […] All three organs provide a protective covering for the body and help maintain homeostasis. All rights reserved. It is made up of the epidermis (outer layer), dermis (middle layer), and the hypodermis (inner, also called subcutaneous tissue layer). The integumentary system is composed of the skin and its appendages, that being the hair, nails, and sweat and oil glands. The Integumentary System is the Skin is composed of the Epidermis, Dermis and Hypodermis. How does the integumentary system interact with... Where is oxygen exchanged for carbon dioxide in... How does chytridiomycosis ''Bd'' cause amphibian... Why are amphibian populations declining... Why are amphibians more prone to extinction? The dermis: The middle layer of the skin which gives the skin its elasticity and its ability to stretch The integumentary system consists of the skin, hair, and nails. The deeper layer of skin is well vascularized (has numerous blood vessels). Integumentary System: The four bodily structures in the integumentary system are the skin, hair, nails, and glands within the skin. The middle layer of the skin. The hair matrix is the innermost layer. In its interior the blood vessels, glands and nerve endings are conjugated. Definition. What Are the Organ Systems of the Human Body? It does not have any blood vessels within it (i.e., it is avascular). Dermis. Also called a subcutaneous layer. protection, regulation of body temperature, sensation, excretion, blood, synthesis of Vitamin D 3. skin, hair, glands, nails, & nerve endings 2. integumentary system: skin and its accessory structures. The outer layer of the skin. Inner layer of the skin. the middle of a human body. What is the HYPODERMIS or SUBCUTANEOUS TISSUE? Integumentary System Study Guide 1. integumentary system. It contains loosely arranged cells and air spaces. dermis. The integumentary system consists of the skin and its appendages. What are the 5 components to the Integumentary system? answer choices . ... thete is no epidermis in the integumentary system . This gas exchange system, where gases simply diffuse into and out of the interstitial fluid, is called integumentary exchange. The Integumentary System Accessory Structures: Glands, What is Epidermis? See Figure 7.1 below to see the three layers The innermost layer of the epidermis is constantly reproducing itself. Integumentary System Study Guide 1. The skin is the only part of the integumentary system that... Our experts can answer your tough homework and study questions. - Definition, Function & Layers, What Is the Muscular System? Tags: Question 3 . The keratinocytes of the basal layer contain melanin, the protein responsible for giving color to the skin. The skin and its accessory structures make up the integumentary system, which provides the body with overall protection. Epidermis. The hollow tube in which the hair grows is called the: hair follicles. The appendages are of epithelial origin and include nails, hair, sweat glands (sudoriferous glands), mammary glands, and sebaceous glands. The Integumentary System: The Dermal Layer 8:49 What is the middle layer of the integumentary system called? Term. How do amphibians integumentary systems work? Sciences, Culinary Arts and Personal skin, hair, glands, nails, & nerve endings 2. Answer: The epidermis and the dermis 6. Vitamin D is produced in the skin. answer choices . The integumentary system consists of the largest organ in the body: the skin. hyponychium: thickened layer of stratum corneum that lies below the free edge of the nail. hyponychium: thickened layer of stratum corneum that lies below the free edge of the nail. Subcutaneous fat layer. keloid: type of scar that has layers raised above the skin surface Tags: Question 6 . 20lbs or 16% of the body's total weight. b) Melanocytes produce melanin to color the skin and protect it from UV rays. This is where it secretes an oily, lipid-based substance called sebum. Integumentary System: The four bodily structures in the integumentary system are the skin, hair, nails, and glands within the skin. He Integumentary system is composed of the skin and adjoining structures called faneras, such as hair, nails, sweat glands and sebaceous, and in some animals scales or feathers.. acne: skin condition due to infected sebaceous glands, albinism: genetic disorder that affects the skin, in which there is no melanin production, anagen: active phase of the hair growth cycle, apocrine sweat gland: type of sweat gland that is associated with hair follicles in the armpits and genital regions, arrector pili: smooth muscle that is activated in response to external stimuli that pull on hair follicles and make the hair “stand up”, basal cell carcinoma: cancer that originates from basal cells in the epidermis of the skin, basal cell: type of stem cell found in the stratum basale and in the hair matrix that continually undergoes cell division, producing the keratinocytes of the epidermis, bedsore: sore on the skin that develops when regions of the body start necrotizing due to constant pressure and lack of blood supply; also called decubitis ulcers, callus: thickened area of skin that arises due to constant abrasion, catagen: transitional phase marking the end of the anagen phase of the hair growth cycle, corn: type of callus that is named for its shape and the elliptical motion of the abrasive force, cortex: in hair, the second or middle layer of keratinocytes originating from the hair matrix, as seen in a cross-section of the hair bulb, cuticle: in hair, the outermost layer of keratinocytes originating from the hair matrix, as seen in a cross-section of the hair bulb, dermal papilla: (plural = dermal papillae) extension of the papillary layer of the dermis that increases surface contact between the epidermis and dermis, dermis: layer of skin between the epidermis and hypodermis, composed mainly of connective tissue and containing blood vessels, hair follicles, sweat glands, and other structures, desmosome: structure that forms an impermeable junction between cells, eccrine sweat gland: type of sweat gland that is common throughout the skin surface; it produces a hypotonic sweat for thermoregulation, eczema: skin condition due to an allergic reaction, which resembles a rash, elastin fibers: fibers made of the protein elastin that increase the elasticity of the dermis, eleiden: clear protein-bound lipid found in the stratum lucidum that is derived from keratohyalin and helps to prevent water loss, epidermis: outermost tissue layer of the skin, eponychium: nail fold that meets the proximal end of the nail body, also called the cuticle, external root sheath: outer layer of the hair follicle that is an extension of the epidermis, which encloses the hair root, first-degree burn: superficial burn that injures only the epidermis, fourth-degree burn: burn in which full thickness of the skin and underlying muscle and bone is damaged, glassy membrane: layer of connective tissue that surrounds the base of the hair follicle, connecting it to the dermis, hair bulb: structure at the base of the hair root that surrounds the dermal papilla, hair follicle: cavity or sac from which hair originates, hair matrix: layer of basal cells from which a strand of hair grows, hair papilla: mass of connective tissue, blood capillaries, and nerve endings at the base of the hair follicle, hair root: part of hair that is below the epidermis anchored to the follicle, hair shaft: part of hair that is above the epidermis but is not anchored to the follicle, hair: keratinous filament growing out of the epidermis, hypodermis: connective tissue connecting the integument to the underlying bone and muscle, hyponychium: thickened layer of stratum corneum that lies below the free edge of the nail, integumentary system: skin and its accessory structures, internal root sheath: innermost layer of keratinocytes in the hair follicle that surround the hair root up to the hair shaft, keloid: type of scar that has layers raised above the skin surface, keratin: type of structural protein that gives skin, hair, and nails its hard, water-resistant properties, keratinocyte: cell that produces keratin and is the most predominant type of cell found in the epidermis, keratohyalin: granulated protein found in the stratum granulosum, Langerhans cell: specialized dendritic cell found in the stratum spinosum that functions as a macrophage, lunula: basal part of the nail body that consists of a crescent-shaped layer of thick epithelium, Meissner corpuscle: (also, tactile corpuscle) receptor in the skin that responds to light touch, Merkel cell: receptor cell in the stratum basale of the epidermis that responds to the sense of touch, medulla: in hair, the innermost layer of keratinocytes originating from the hair matrix, melanin: pigment that determines the color of hair and skin, melanocyte: cell found in the stratum basale of the epidermis that produces the pigment melanin, melanoma: type of skin cancer that originates from the melanocytes of the skin, melanosome: intercellular vesicle that transfers melanin from melanocytes into keratinocytes of the epidermis, metastasis: spread of cancer cells from a source to other parts of the body, nail bed: layer of epidermis upon which the nail body forms, nail body: main keratinous plate that forms the nail, nail cuticle: fold of epithelium that extends over the nail bed, also called the eponychium, nail fold: fold of epithelium at that extend over the sides of the nail body, holding it in place, nail root: part of the nail that is lodged deep in the epidermis from which the nail grows, Pacinian corpuscle: (also, lamellated corpuscle) receptor in the skin that responds to vibration, papillary layer: superficial layer of the dermis, made of loose, areolar connective tissue, reticular layer: deeper layer of the dermis; it has a reticulated appearance due to the presence of abundant collagen and elastin fibers, rickets: disease in children caused by vitamin D deficiency, which leads to the weakening of bones, scar: collagen-rich skin formed after the process of wound healing that is different from normal skin, sebaceous gland: type of oil gland found in the dermis all over the body and helps to lubricate and waterproof the skin and hair by secreting sebum, sebum: oily substance that is composed of a mixture of lipids that lubricates the skin and hair, second-degree burn: partial-thickness burn that injures the epidermis and a portion of the dermis, squamous cell carcinoma: type of skin cancer that originates from the stratum spinosum of the epidermis, stratum basale: deepest layer of the epidermis, made of epidermal stem cells, stratum corneum: most superficial layer of the epidermis, stratum granulosum: layer of the epidermis superficial to the stratum spinosum, stratum lucidum: layer of the epidermis between the stratum granulosum and stratum corneum, found only in thick skin covering the palms, soles of the feet, and digits, stratum spinosum: layer of the epidermis superficial to the stratum basale, characterized by the presence of desmosomes, stretch mark: mark formed on the skin due to a sudden growth spurt and expansion of the dermis beyond its elastic limits, telogen: resting phase of the hair growth cycle initiated with catagen and terminated by the beginning of a new anagen phase of hair growth, third-degree burn: burn that penetrates and destroys the full thickness of the skin (epidermis and dermis), vitamin D: compound that aids absorption of calcium and phosphates in the intestine to improve bone health, vitiligo: skin condition in which melanocytes in certain areas lose the ability to produce melanin, possibly due an autoimmune reaction that leads to loss of color in patches, http://openstaxcollege.org/files/textbook_version/low_res_pdf/13/col11496-lr.pdf. 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