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the superficial, thinner layer of skin, composed of keratinized stratified squamous epithelium
a continuous sheet of areolar connective tissue and adipose tissue between the dermis of the skin and the deep fascia of the muscles
the deepest layer of the epidermis consisting of stem cells capable of undergoing cell division to form new cells
a layer of the epidermis that marks the transition between the deeper, metabolically active strata and the dead cells of the more superficial strata
a layer of the epidermis found only in the thick skin of the fingers, palms, and soles
a fingerlike projection of the dermis that may contain blood capillaries or Meissner corpuscles (of touch)
internal root sheath
a covering of epithelium produced by the matrix that surrounds the root of the hair
the base of a hair follicle and its surrounding dermal root sheath, containing the papilla of the hair and matrix
papilla of the hair
a nipple-shaped indentation which contains areolar connective tissue and many blood vessels that nourish the growing hair follicle
a germinal layer of cells responsible for the growth of existing hairs and the production of new hairs when old hairs are shed
a smooth muscle attached to hair follicles that causes "goose bumps" to appear on the skin when contracted
a type of nerve ending located in the subcutaneous layer that is sensitive to pressure; also described as "lamellated"
free nerve ending
dendrites that lack any obvious structural specialization; used to generate sensations of warmth, coolness, pain, tickle, and itch
a tactile nerve ending receptor in the dermal papillae that is sensitive to touch
apocrine sudoriferous gland
found in the skin of the axilla, groin, and areolae; secretes a viscous, lipid- and protein-rich product into a hair follicle upon stimulation during emotional distress or sexual excitement
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