Eccrine
________ glands- the major sweat glands of the body, cover most of the body, open directly onto the skin.
Papillary Layer
________- dermal papillae that protrude from the surface up into the epidermis.
Epidermal Ridges
________- increases surface area for oxygen, diffusion from the dermis.
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)
Albinism
________- prevents the normal production of melanin, and produces very little pigment in the skin, hair, and eyes.
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.
Dust
________- (dead) cells that shed from the stratum corneum.
Melanocytes
________- produce melanin, a pigment that protects the body from harmful UV radiation.
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.
uric acid
Process of sweating- the body eliminates chemical waste products, including urea, ________, and salts.
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.
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.
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.
Keratinocytes
________- produce keratin.
Exposure
________ to sunlight causes melanocytes to produce more melanin.
Freckles
________- clusters of melanocytes.
Stratum Granulosum
________- produces a large amount of keratin, die eventually due to lack of oxygen.
epidermis
The ________ contains five layers of tissue.
Merkel cells
________- located in the stratum basale, function as touch receptors.
Stratum Lucidum
________- clear layer of dead, keratinized cells.
Melanin
________- primarily responsible for human skin color.
Stratum Basale
________- deepest layer with melanocytes.
Stratum Corneum
________- the oldest layer of cells.
dendritic cells
Epidermal ________- respond to the presence of foreign bacteria or viruses by initiating an immune system response.
keratin
a tough protein also found in hair and nails that adds structural strength, helps to protect the skin against damage
keratinocytes
produce keratin
Melanocytes
produce melanin, a pigment that protects the body from harmful UV radiation
Melanin
primarily responsible for human skin color
Freckles
clusters of melanocytes
Process of sweating
the body eliminates chemical waste products, including urea, uric acid, and salts
sudoriferous glands
distributed in the dermis over the entire body (sweat glands)
eccrine glands
the major sweat glands of the body, cover most of the body, open directly onto the skin
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
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
Epidermis
the surface epithelium of the skin, overlying the dermis
Stratum Corneum
the oldest layer of cells
dust
(dead) cells that shed from the stratum corneum
Stratum Lucidum
clear layer of dead, keratinized cells
Epidermal Ridges
increases surface area for oxygen, diffusion from the dermis
Stratum Granulosum
produces a large amount of keratin, die eventually due to lack of oxygen
Stratum Spinosum
cells begin forming desmosomes to attach to each other in layers
Stratum Basale
deepest layer with melanocytes
Merkel cells
located in the stratum basale, function as touch receptors
Epidermal dendritic cells
respond to the presence of foreign bacteria or viruses by initiating an immune system response
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
Papillary Layer
dermal papillae that protrude from the surface up into the epidermis
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
Hypodermis (subcutaneous fascia)
a storage repository for fat