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The components of the integumentary system receive their innervation, mostly autonomic, via spinal and cranial nerves. Epidermal ridges can be used to identify individuals because their patterns are genetically determined so no two people (other than identical twins) have exactly the same epidermal ridge pattern. Why does this layer provide most of the cushioning, instead of the other layer? Tattoos and Piercings. In bone, the main cells are ________. Integumentary System: What It Is, Function & Organs. The secretions are enclosed in vesicles that move to the apical surface of the cell where the contents are released by exocytosis. Your integumentary system acts as a physical barrier — protecting your body from bacteria, infection, injury and sunlight.
Merocrine secretion is the most common type of exocrine secretion. The anatomy of your nail consists of: - Nail plate: The hard part of your nail you can see. Apocrine glands occur only in the armpits and groin and have ducts that empty into hair follicles. The various components of this system work in conjunction to carry out these functions [1].
Ciliated columnar epithelium is composed of simple columnar epithelial cells that display cilia on their apical surfaces. The cuticle (eponychium) is an extension of the proximal nail fold located on the dorsal aspect of the nail plate, overlying the root of the nail. Sample answer: Two functions of the nails are enhancing the sense of touch in the fingertips and protecting the ends of the fingers and toes. This allows sweat that is produced in the glands to be released at the surface of the skin. In this case, the cell becomes part of the secretion. Layers of the Skin There are two layers of the skin: The epidermis: The outer layer of the skin that makes up its strong protective covering. Integumentary system worksheet answer key. Dead cells from the stratum corneum are continually being shed and replaced anyway — this is a normal process. The structure of a tissue usually is optimized for its function.
Sweating also assists this process. Elderly individuals who suffer from vitamin D deficiency can develop a condition called osteomalacia, a softening of the bones. What is the importance of vitamin D synthesis in the epidermis? Protection: The skin and hair provide a barrier against harmful substances, ultraviolet (UV) radiation from the sun, and temperature extremes. Explain why most of the nail plate looks pink. Nails Just like other body parts, nails consist of several segments, including: The nail plate: The part of the nail that is visible. Underlying connective tissue framework that supports the epidermis. Cells tissues and integument answer key 2020. Skeletal and cardiac muscles. The papillary layer has papillae extending upward toward the epidermis; the reticular layer lacks such papillae. What is the function of the cuticle? The skin protects the rest of the body from the basic elements of nature such as wind, water, and UV sunlight. The new cells are born at the base of the structure (the stratum basale; base of the hair follicle; and nail matrix, respectively) and push the older cells out. When the bladder is empty, this epithelium is convoluted and has cuboidal-shaped apical cells with convex, umbrella shaped, surfaces.
Sample answer: Three physiological roles played by hair are reducing heat loss from the head, filtering particles out of inhaled air in the nose, and keeping harmful substances out of the eyes. Sweat excreted from sweat glands deters microbes from over-colonizing the skin surface by generating dermicidin, which has antibiotic properties. By the end of this section, you will be able to: - Describe the different functions of the skin and the structures that enable them. Composed of skin, hair, nails, glands, and nerves, its main job is to protect your insides from elements in your environment, like pollution and bacteria. The skin responds to UV rays by producing the pigment melanin in cells called melanocytes. Integumentary system: Definition, diagram and function. The role of skin absorption as a route of exposure for volatile organic compounds (Vocs) in drinking water. It increases the mobility of the skin, it thermally insulates the body, acts as a shock absorber and is a source of energy. Interactive Link Questions. They are composed of a protein called keratin and grow from the base of the nail bed. A nail grows from a deep layer of living epidermal tissues, called the nail matrix, at the proximal end of the nail. First, epithelial tissue is highly cellular, with little or no extracellular material present between cells.
Hirsutism: Excessive hair growth in people assigned female at birth. Hairs in the nose trap pathogens and prevent them from entering deeper into the body. Cells tissues and integument answer key check unofficial. Nails protect the tips of the fingers and toes from injury and support fine motor tasks such as picking up small objects. The nail matrix contains blood vessels and nerves as well as stem cells that divide to produce keratinocytes, which make up the nail. These extensions beat in unison, allowing for the movement of fluids and particles along the surface. Gray and white hair occur when melanin production slows down and eventually stops. This is probably ________.
Sebaceous glands are part of the pilosebaceous unit, which includes the hair, hair follicle, and arrector pili muscle. Such ciliated epithelia line the ventricles of the brain where it helps circulate cerebrospinal fluid and line the respirtatory system where it helps sweep particles of dust and pathogens up and out of the respiratory tract. The process by which a less specialized cell matures into a more specialized cell is called ________. Regenerates from stem cells located in the basal layer that grow up towards the corneum. The sympathetic nervous system is continuously monitoring body temperature and initiating appropriate motor responses.
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