Chapter 12 Skin The Integumentary System A&P Flashcards
is made up of the skin and its related structures, performs important functions in maintaining the health of the body
integumentary system
forms the protective outer covering the external surfaces of the entire body
skin
secrete sebum (oil) that lubricates the skin and discourages the growth of bacteria on the skin
sebaceous glands
help regulate body temperature and water content by secreting sweat.
sudoriferous glands
helps control the loss of body heat
hair
protects the dorsal surface of the last bone of each toe and finger
nails
what are the three layers of the skin
epidermis, dermis, and subcutaneous
means pertaining to the skin
cutaneous
is the outermost layer of the skin, is made up of several specialized epithelial tissues
epidermis
form a protective covering for all of the internal and external surfaces of the body
epithelial tissues
forms the upper layer of the epidermis. consists of flat, scaly cells that are continuously shed
squamous epithelial tissue
is the lowest layer of the epidermis. here that new cells are produced and then pushed upward
basal layer
is a fibrous, water-repellent protein. is a primary component of the epidermis
keratin
are special cells that are also found in the basal layer. produce and contain a dark brown to black pigment known as melanin
melanocytes
is the pigment that determines the color of the skin, which depends upon the type and amount of this pigment present
melanin
refers to light that is beyond the visible spectrum at the violet end. some help the skin produce vitamin D, others damage the skin
ultraviolet
also known as the corium, is the thick layer of living tissue directly below the epidermis
dermis
in the dermis are sensory receptors for stimuli such as touch, temperature, pain, and pressure
sensory nerve endings
means glue, is a tough, yet flexible, fibrous protein material found in the skin
collagen
found in the connective tissue of the dermis, respond to injury, infection, or allergy by producing and releasing substances, including heparin and histamine
mast cells
which is released in response to an injury, is an anticoagulant
heparin
prevents blood clotting
heparin
is released in response to allergens, causes the signs of an allergic response, including itching and increased mucus secretion
histamine
is located just below the layers of the skin and connects the skin to the surface muscle
subcutaneous layer
layer is made up of loose connective tissue fat
adipose tissue
means fat
adipose
is a term used to describe deposits of dimpled fat around the buttocks and thighs.
cellulite
also known as fat cells, are predominant in the subcutaneous layer where they manufacture and store large quantities of fat
lipocytes
are located in the dermis layer of the skin and closely associated with hair follicles
sebaceous glands
is an oily substance that is released through ducts opening into the hair follicles
sebum
modified sebaceous glands, are sometimes classified with the integumentary system
mammary glands
also known as sudoriferous glands, are tiny, coiled glands found on almost all body surfaces
sweat glands
are the opening on the surface of the skin that act as the ducts of the sweat glands
pores
commonly known as sweat, is secreted by sweat glands and is made up of 99% water plus some salt and metabolic waste products
perspiration
is the production and excretion of perspiration
hidrosis
fibers are rod-like structures composed of tightly fused, dead, protein cells filled with hard keratin
hair
are the sacs that hold the root of the hair fibers. shape determines whether the hair is straight or curly
hair follicles
are tiny muscle fibers attached to the hair follicles that cause the hair to stand erect
arrector pili
which is commonly known as a fingernail or toenail, is the keratin plate that protects the dorsal surface of the last bone of each finger
unguis
is translucent, is closely molded to the surface of the underlying tissues
nail body
joins the nail body to the under lying connective tissue, nourishes the nail
nail bed
is the portion of the nail not attached to the nail bed
free edge
is a pale half-moon shaped region at every nail root, which generally most easily seen in the thumbnail
lunula
is a narrow band of epidermis attached to the surface of the nail just in front of the root
cuticle
fastens the nail to the finger or toe by fitting into a groove in the skin
nail root
is a physician who specializes in diagnosing and treating disorders of the skin
dermatologist
is a physician who specializes in the surgical restoration and reconstruction of the body structures
plastic surgeon
are plastic surgeons who perform operations such as breast augmentation, liposuction, and face lifts that are usually done for aesthetic rather than medical reasons
cosmetic surgeons
is a form of seborrheic dermatitis, as is the scalp rash in infants
dandruff, craddle cap
is an accidental puncture wound caused by a used hypodermic needle, potentially transmitting an infection
needlestick injury
also known as fifth disease, is a mildly contagious viral infection that is common in childhood. produces a red, lace-like rash on the child’s face that looks as if the child has been slapped
erythema infectious
is a skin disorder resulting from a generalized allergic reaction to an illness, infection, or medication
erythema multiform
also known as chilblains, is a purple-red inflammation that occurs when the small blood vessels below the skin are damaged, usually due to exposure to cold and damp weather
erythema pernio
is a form of erythema in which skin cells are damaged by exposure to the ultraviolet rays in sunlight
sunburn
is a breaking out, or eruption, that changes the color or texture of the skin
rash
is found on the scalps of children, a form of ringworm
tinea capitis
is a fungal infection of the skin on the body, a form of ringworm
tinea corporis
also known as jock itch, is found in the genital area, a form of ringworm
tinea cruris
also known as athlete’s foot, is most commonly found between the toes, a form of ringworm
tinea pedis
also known as pityriasis versicolor, is a fungal infection that causes painless, discolored area of the skin, a form of ringworm
tinea versicolor
is an infestation with head lice
pediculosis capitis
is an infestation with body lice
pediculosis corporis
is an infestation with lice in the pubic hair and pubic region
pediculosis pubis
a piece, but not all, of the tumor of lesion is removed
incisional biopsy
the entire tumor or lesion and a margin of surrounding tissue are removed
excisional biopsy
a hollow needle is used to remove a core of tissue for examination
needle biopsy
is the removal of dead epidermal cells
exfoliation
known by its trade name accutane, is a powerful retinoid in pill form for the treatment of severe acne
isoretinoin
is the active ingredient in Retin-A and Renova, which are used to treat sun-damaged skin, acne, and wrinkles
tretinoin
is a latin term meaning common
vulgaris
a comedo with an obstructed opening is called
whitehead (closed comedo)
a sebum plug that is exposed to air often oxidizes and becomes a
blackhead (open comedo)
is an intensely itchy rash caused by blockage of the sweat glands by bacteria and dead cells
heat rash (prickly heat)
means occurring in patches
areata
means total
universalis
is blood trapped under a finger or toenail
subungual hematoma
are verrucae that develop on the sole of the foot
plantar warts
means contained within a limited area
circumscribed
is a feeling of general discomfort or uneasiness that is often the first indication of an infection or other disease
malaise
is decay that produces foul-smelling odor
putrefaction
is a callus in the keratin layer of the skin covering the joints of the toes, usually caused by ill-filling shoes
clavus or corn
removes only a fine layer of skin, so the results are temporary
microdermabrasion
is an incision of a lesion, such as an abscess, and the draining of the contents
incision and drainage (I&D)
are small, nonessential veins that can be seen through the skin
spider veins
also known as itching, is associated with most forms of dermatitis
pruritus
profuse sweating
diaphoresis (hyperhydrosis)