BIOD 103 Module 3 Guide
Integument - answer Covering membrane of the body (skin)
Integ/o - answer To cover
Dermatology - answer Study of skin and skin disorders
Integumentary accessory structures - answer Nails, hair, sebaceous glands, sweat
glands
Skin - answer largest organ of the body, >3000 sq in, 6 lbs
Skin function - answer Protect, regulate temp, sense, secrete
Sweat glands - answer Secrete sweat: water, salt, other chemicals
Sebaceous glands - answer Secrete sebum: oily substance that protects skin from
dehydration
Skin layers - answer Epidermis, dermis
Epidermis - answer Outer layer of skin, 5 layers
Epidermis layers - answerDeep: stratum germinativum, stratum spinous, stratum
granulosum, stratum lucidum, and stratum corneum
Melanin - answerPigment found in stratum germinativum, gives skin its color
Stratum spinosum - answerThe spiny layer just above the stratum germinativum layer
Langerhans cells - answerCells in stratum spinosum that protect skin from microbes
Stratum granulosum and stratum lucidum - answerFormed of keratin
Keratin - answerprotein that forms hair, nails, and the tough outer layer of skin
Stratum corneum - answermost superficial layer of the epidermis, consists of dead cells
Dermis - answerDeep to epidermis, made of connective tissue
Dermis structures - answerNerves, blood vessels, sebaceous/sweat glands, elastic
fibers, hair follicles, and lymphatic vessels
, Macule - answerflat, discolored spot on skin
Ex: mole, birthmark
Wheal - answerLocalized, temporary elevation of skin that is itchy
Ex: uricaria or hives
Papule - answerSolid, confined, and elevated area on the skin
Ex: pimple
Vesicle - answerSmall, fluid filled sac
Ex: blister
Pustule - answerSmall, elevated, confined lesion filled with pus
Ex: pimple
Ulcer - answerErosion of healthy tissue
Fissure - answerCrack-like slit that extends through epidermis into dermis
Hair - answerThin, stringlike structure that develops from hair follicle
Hair root - answerEmbedded in follicle
Hair shaft - answerVisible portion
Nails - answerKeratin, on ends of fingers and toes
Nail body - answerVisible portion, covers nail bed
Nail root - answerFold of epithelial tissue that is not visible
Nail bed - answerEpithelial tissue located deep to the nail body
Eponychium - answerCuticle, epithelial fold that extends over the base of the nail body
Lunula - answerCrescent-shaped area at base of nail body that is lighter than the rest of
the nail
Free edge - answerTop of the nail body that projects over the top of the finger/toe
Nail growth - answerAverage 1mm/wk
Sebaceous glands - answerOil-secreting glands, open into hair follicle, secrete sebum,
controlled by endocrine system
Integument - answer Covering membrane of the body (skin)
Integ/o - answer To cover
Dermatology - answer Study of skin and skin disorders
Integumentary accessory structures - answer Nails, hair, sebaceous glands, sweat
glands
Skin - answer largest organ of the body, >3000 sq in, 6 lbs
Skin function - answer Protect, regulate temp, sense, secrete
Sweat glands - answer Secrete sweat: water, salt, other chemicals
Sebaceous glands - answer Secrete sebum: oily substance that protects skin from
dehydration
Skin layers - answer Epidermis, dermis
Epidermis - answer Outer layer of skin, 5 layers
Epidermis layers - answerDeep: stratum germinativum, stratum spinous, stratum
granulosum, stratum lucidum, and stratum corneum
Melanin - answerPigment found in stratum germinativum, gives skin its color
Stratum spinosum - answerThe spiny layer just above the stratum germinativum layer
Langerhans cells - answerCells in stratum spinosum that protect skin from microbes
Stratum granulosum and stratum lucidum - answerFormed of keratin
Keratin - answerprotein that forms hair, nails, and the tough outer layer of skin
Stratum corneum - answermost superficial layer of the epidermis, consists of dead cells
Dermis - answerDeep to epidermis, made of connective tissue
Dermis structures - answerNerves, blood vessels, sebaceous/sweat glands, elastic
fibers, hair follicles, and lymphatic vessels
, Macule - answerflat, discolored spot on skin
Ex: mole, birthmark
Wheal - answerLocalized, temporary elevation of skin that is itchy
Ex: uricaria or hives
Papule - answerSolid, confined, and elevated area on the skin
Ex: pimple
Vesicle - answerSmall, fluid filled sac
Ex: blister
Pustule - answerSmall, elevated, confined lesion filled with pus
Ex: pimple
Ulcer - answerErosion of healthy tissue
Fissure - answerCrack-like slit that extends through epidermis into dermis
Hair - answerThin, stringlike structure that develops from hair follicle
Hair root - answerEmbedded in follicle
Hair shaft - answerVisible portion
Nails - answerKeratin, on ends of fingers and toes
Nail body - answerVisible portion, covers nail bed
Nail root - answerFold of epithelial tissue that is not visible
Nail bed - answerEpithelial tissue located deep to the nail body
Eponychium - answerCuticle, epithelial fold that extends over the base of the nail body
Lunula - answerCrescent-shaped area at base of nail body that is lighter than the rest of
the nail
Free edge - answerTop of the nail body that projects over the top of the finger/toe
Nail growth - answerAverage 1mm/wk
Sebaceous glands - answerOil-secreting glands, open into hair follicle, secrete sebum,
controlled by endocrine system
