The skin consists of two distinct layers, an outer layer called the epidermis and an inner layer called the dermis. What is the middle layer of the integumentary system called? Tags: Question 6 . Integumentary System Study Guide 1. What Are the Organ Systems of the Human Body? Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Subcutaneous fat layer. 20lbs or 16% of the body's total weight. Also called a subcutaneous layer. It contains loosely arranged cells and air spaces. The Integumentary System is the Skin is composed of the Epidermis, Dermis and Hypodermis. The hair shaft, in itself, contains three layers: the outermost cuticle, a middle layer called the cortex, and an innermost layer called the medulla. Integumentary System: The four bodily structures in the integumentary system are the skin, hair, nails, and glands within the skin. Check ALL facts that are true about the integumentary system. This is where it secretes an oily, lipid-based substance called sebum. The skin covers the majority of the body and contains glands in the outer ear canal and the preen gland at the base of the tail, that the bird uses to preen its feathers. Sciences, Culinary Arts and Personal The lowest layer of the epidermis is called the germinative layer where new skin cells are constantly produced by mitosis. The hair matrix is the innermost layer. The outermost layer is the cuticle. The integumentary system is very important […] What is the HYPODERMIS or SUBCUTANEOUS TISSUE? Your skin is a vital part of your life and appearance (a–d). 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 This gas exchange system, where gases simply diffuse into and out of the interstitial fluid, is called integumentary exchange. (The hypodermis or subcutaneous layer is not part of the skin.) The hollow tube in which the hair grows is called the: hair follicles. hyponychium: thickened layer of stratum corneum that lies below the free edge of the nail. - Definition, Types & Examples, High School Physical Science: Homeschool Curriculum, CSET Science Subtest II Earth and Space Sciences (219): Test Prep & Study Guide, ILTS Science - Earth and Space Science (108): Test Practice and Study Guide, Science 102: Principles of Physical Science, Introduction to Natural Sciences: Certificate Program, DSST Principles of Physical Science: Study Guide & Test Prep, Introduction to Physical Geology: Help and Review, High School Physical Science: Tutoring Solution, Physical Geology Syllabus Resource & Lesson Plans, Physical Science Curriculum Resource & Lesson Plans, Holt Science Spectrum - Physical Science: Online Textbook Help, Holt Science Spectrum - Physical Science with Earth and Space Science: Online Textbook Help, Holt McDougal Environmental Science: Online Textbook Help, TExES Physical Science 6-12 (237): Practice & Study Guide, MTLE Middle Level Science: Practice & Study Guide, Biological and Biomedical protection, regulation of body temperature, sensation, excretion, blood, synthesis of Vitamin D 3. epidermis. 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. internal root sheath: innermost layer of keratinocytes in the hair follicle that surround the hair root up to the hair shaft. The middle layer of the skin. Definition. Definition. This gas exchange system, where gases simply diffuse into and out of the interstitial fluid, is called integumentary exchange. The integumentary system consists of the largest organ in the body: the skin. The deeper layer of skin is well vascularized (has numerous blood vessels). The hair matrix surrounds the bottom of the hair shaft where it is embedded within the hair bulb. What are the 5 components to the Integumentary system? [Return to Figure 6.6]. According to OpenStax (2018), … This extraordinary organ system protects the internal structures of the body from damage, prevents dehydration, stores fat, and produces vitamins and hormones.It also helps maintain homeostasis within the body by assisting with the regulation of body temperature and water balance. The hair matrix surrounds the bottom of the hair shaft where it is embedded within the hair bulb. How much does the INTEGUMENTARY System weigh/what percetage of the body's weight? 20lbs or 16% of the body's total weight. Also called a subcutaneous layer, this is a layer of fat is lo… A pigment that gives the skin, hair and eyes color and helps p… A small tubular cavity in skin containing the root of a hair a… (The hypodermis or subcutaneous layer is not part of the skin.) - Function & How Muscles Work in Groups, The Six Types of Synovial Joints: Examples & Definition. hypodermis. keloid: type of scar that has layers raised above the skin surface The Integumentary System Accessory Structures: Glands, What is Epidermis? Functions of the integumentary system include providing a protective covering for the body, sensing the environment, and helping the body maintain homeostasis. The Integumentary System. What is the HYPODERMIS or SUBCUTANEOUS TISSUE? How do amphibians integumentary systems work? b) Melanocytes produce melanin to color the skin and protect it from UV rays. What's the outer-most layer of your skin called? The integumentary system consists of the largest organ in the body: the skin. The human skin (integument) is composed of a minimum of two major layers of tissue: the epidermis and dermis. The middle layer is the cortex. internal root sheath: innermost layer of keratinocytes in the hair follicle that surround the hair root up to the hair shaft. the middle of a human body. skin, hair, glands, nails, & nerve endings 2. 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.. ... What are the hairs on a new born baby called? Become a Study.com member to unlock this skin, hair, glands, nails, & nerve endings 2. This is where it secretes an oily, lipid-based substance called sebum. The skin consists of two distinct layers: a thinner outer layer called the epidermis, and a thi cker inner layer called … Glossary of Integumentary System Terms and Terminology for the TEAS. The innermost layer is called the medulla. The hair shaft, in itself, contains three layers: the outermost cuticle, a middle layer called the cortex, and an innermost layer called the medulla. It is a layer of keratinized cells. Tags: Question 3 . Definition. Inner layer of the skin. 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? 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 … c) Merkel Cells are associated with sensory receptors. © copyright 2003-2021 Study.com. The epidermisis composed of keratinized, stratified squamous epithelium. protection, regulation of body temperature, sensation, excretion, blood, synthesis of Vitamin D 3. In humans, the integumentary system consists of the skin, nails, hair, and exocrine glands. - Definition, Function & Layers, What Is the Muscular System? answer choices . The innermost layer of the integumentary system is called the hypodermis. 3. hyponychium: thickened layer of stratum corneum that lies below the free edge of the nail. integumentary system: skin and its accessory structures. 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 and its appendages. It is made up of the epidermis (outer layer), dermis (middle layer), and the hypodermis (inner, also called subcutaneous tissue layer). Which microbial group is responsible for massive... Do amphibians have a complete respiratory... What are some physical features of amphibians? hyponychium: thickened layer of stratum corneum that lies below the free edge of the nail. dermis. What are the 5 components to the Integumentary system? 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 Skin where accessory organs are found gas exchange occurs in amphibians for giving to. 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