Integumentary System
nail
"sports a lunule and a cuticle
apocrine glands
200 of them, found in axillary area and anogenital area
true
True or false: the reticular layer makes up 80% of skin thickness, is dense irregular tissue.
freckle
a localized concentration of melanin
3 million
how many sweat glands are there per person?
stratum granulosum
keratinization happens in which layer of the epidermis?
eccrine glands
most abundant glands, external outlets of hair follicles, 99% water, regulates sweating
chemical barrier, physical barrier, biological barrier, and prevents UV radiation
name 4 protective functions of the skin
papillary layer and reticular layer
name the 2 layers of the dermis
dermis and epidermis
name the 2 layers of the skin
basale, stratum, granulosum, corneum
name the layers of the epidermis from deep to superficial
apocrine and eccrine
name the two types of sweat glands
hair and nails
primarily made up of dead/keratinized cells
tactile corpuscles
sensory receptors in dermis give sense of touch on hairless skin
lamellar corpuscles
sensory receptors in dermis that help sense and feel pressure
nerve endings
sensory receptors in dermis that help sense pain and temperature
cutaneous receptors
specialized nerve ending that respond to temperature and touch
stratum corneum
the cells fall off in this layer, makes skin look water proof
stratum basale
the deepest layer of epidermis
stratum corneum
the most superficial layer of the epidermis
shaft
the portion of the hair that projects from the surface of the skin
melanin and carotene
the skin pigments that contribute to skin color
keratin
the tough water-repellant protein found in epidermal cells
dendritic cells
these cells of the epidermis arise from bone marrow and eat foreign substances & bacteria
tactile cells
these cells of the epidermis have nerve endings
keratinocytes
these cells of the epidermis produce the fibrous protein that provides protection
melanocytes
these cells of the epidermis synthesize melanin
melanocytes
these cells produce brown to black pigment that colors the skin and protects DNA from UV radiation
sebaceous glands
these ducts usually empty "seubm" into hair follicle but may also open directly on the skin surface
stratum basale
this is the deepest layer of epidermis, resembles cardboard, most rapid cell division happens here
arrector pili
tiny muscles, attached to hair follicles that pull the hair upright during cold or fright
true
true or false: nails originate from the epidermis
true
true or false: sensory receptors are found in the dermis of the skin
basal cell carcinoma
what is the least malignant most common form of skin cancer?
melanoma
what is the most dangerous and chemo resistant form of skin cancer
vitamin D
what substance is manufactured in the skin and plays a role in calcium absorption elsewhere in the body?
dermis
which layer is the bulk of skin, vascularized, and dense connective tissue
epidermis
which layer is the outermost layer of skin made up of stratified squamous cells
carotene
yellow-orange pigment found in stratum corneum and the hypodermis