________ glands- the major sweat glands of the body, cover most of the body, open directly onto the skin.
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Papillary Layer
________- dermal papillae that protrude from the surface up into the epidermis.
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Epidermal Ridges
________- increases surface area for oxygen, diffusion from the dermis.
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Integumentary system
________- largest organ of the body that forms a physical barrier between the external environment and the internal environment that it serves to protect and maintain (skin)
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Albinism
________- prevents the normal production of melanin, and produces very little pigment in the skin, hair, and eyes.
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Sebaceous glands
________- located all over the body except for the palms of the hands and soles of the feet, produce an oily substance called sebum.
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Dust
________- (dead) cells that shed from the stratum corneum.
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Melanocytes
________- produce melanin, a pigment that protects the body from harmful UV radiation.
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sweat glands
Skin is also critically important in regulating body temperature, due to the extensive array of tiny capillaries and ________ that lie near the surface of the skin.
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uric acid
Process of sweating- the body eliminates chemical waste products, including urea, ________, and salts.
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Sebum
________- an oily and slightly waxy substance found on the skin, helps to keep the skin and hair softbut also contains chemicals that kill bacteria.
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Keratin
________ and naturally occurring oils in the skin assist in serving as a water barrier, and ________ prevents water from entering the body during bathing or swimming.
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Reticular Layer
________- collagen and elastic fibers in this region have an irregular arrangement, it includes blood and lymphatic vessels, sweat and oil glands, involuntary muscles, hair follicles, and nerve endings.
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Keratinocytes
________- produce keratin.
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Exposure
________ to sunlight causes melanocytes to produce more melanin.
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Freckles
________- clusters of melanocytes.
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Stratum Granulosum
________- produces a large amount of keratin, die eventually due to lack of oxygen.
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epidermis
The ________ contains five layers of tissue.
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Merkel cells
________- located in the stratum basale, function as touch receptors.
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Stratum Lucidum
________- clear layer of dead, keratinized cells.
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Melanin
________- primarily responsible for human skin color.
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Stratum Basale
________- deepest layer with melanocytes.
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Stratum Corneum
________- the oldest layer of cells.
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dendritic cells
Epidermal ________- respond to the presence of foreign bacteria or viruses by initiating an immune system response.
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keratin
a tough protein also found in hair and nails that adds structural strength, helps to protect the skin against damage
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keratinocytes
produce keratin
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Melanocytes
produce melanin, a pigment that protects the body from harmful UV radiation
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Melanin
primarily responsible for human skin color
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Freckles
clusters of melanocytes
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Process of sweating
the body eliminates chemical waste products, including urea, uric acid, and salts
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sudoriferous glands
distributed in the dermis over the entire body (sweat glands)
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eccrine glands
the major sweat glands of the body, cover most of the body, open directly onto the skin
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sebaceous glands
located all over the body except for the palms of the hands and soles of the feet, produce an oily substance called sebum
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sebum
an oily and slightly waxy substance found on the skin, helps to keep the skin and hair softbut also contains chemicals that kill bacteria
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Epidermis
the surface epithelium of the skin, overlying the dermis
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Stratum Corneum
the oldest layer of cells
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dust
(dead) cells that shed from the stratum corneum
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Stratum Lucidum
clear layer of dead, keratinized cells
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Epidermal Ridges
increases surface area for oxygen, diffusion from the dermis
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Stratum Granulosum
produces a large amount of keratin, die eventually due to lack of oxygen
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Stratum Spinosum
cells begin forming desmosomes to attach to each other in layers
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Stratum Basale
deepest layer with melanocytes
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Merkel cells
located in the stratum basale, function as touch receptors
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Epidermal dendritic cells
respond to the presence of foreign bacteria or viruses by initiating an immune system response
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Dermis
thick layer of living tissue below the epidermis which forms the true skin, containing blood capillaries, nerve endings, sweat glands, hair follicles, and other structures
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Papillary Layer
dermal papillae that protrude from the surface up into the epidermis
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Reticular Layer
collagen and elastic fibers in this region have an irregular arrangement, it includes blood and lymphatic vessels, sweat and oil glands, involuntary muscles, hair follicles, and nerve endings
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