Chapter 2 Flashcards
(147 cards)
Epidermis
thin, outermost layer of the skin
categorized as epithelium
Squamous layer
contains som living cells but its surface cells are dead cells that are filled with keratin
Basal layer
deepest layer, composed of living cells that are constantly dividing and moving to the surface
Melanocyte
pigment cells that produce melanin
Dermis
layer of skin beneath the epidermis
contains: collagen and elastic fibers arteries, veins, and nerves, as well as sebaceous glands
Collagen
white protein fibers in the dermis
Elastin
yellow elastin fibers in the dermis
Sebaceous glands
aka oil glands
found in the dermis, type of exocrine gland because it secretes a substance (sebum) through a duct
Sebum
substance secreted by sebaceous glands
Sudoriferous glands
aka sweat glands
found in the dermis
type of exocrine gland
Diaphoresis
process of producing sweat
Perspiration
sweat
Follicle
a small gland in which the hair forms
Piloerection
when the skin is cold, or when someone experiences a strong emotion, the hairs stand up
aka goosebumps
Nail plate
hard, translucent outer layer
composed of dead cells that contain keratin
Nail root
located beneath the skin on the upper surface of the finger and toe
Lunula
visible white, half moon shape on the nail
Cuticle
layer of dead cells that lies around the proximal base of the nails
Nail bed
beneath the top nail plate
contains nerves and blood vessels
Subcutaneous tissue
directly beneath the dermis and is composed of connective tissue and adipose tissue
Adipose tissue
fatty tissue
contains lipocytes
Lipocyte
cells that store fat as an energy reserve for the body
Integumentary system
consists of: skin, nails, and the subcutaneous system
functions: protection, repair, sensation, vitamin D synthesis, thermoregulation, and homeostasis
Cutaneous
pertaining to the skin