Ch 12 The Integumentary System

Ch 12 Skin: the
Skin- cutane/o, dermat/o, derm/o- Intact skin
is the first line of defense for the immune
system. Skin also waterproofs the body and is
the major receptor for the sense of touch.
Sebaceous glands- seb/o- Secret sebum (oil)
to lubricate the skin and discourage the
growth of bacteria on the skin.
Sweat glands- hidr/o- secrete sweat to
regulate body temperature and water
content and excrete some metabolic waste.
More Terms
 Hair-
pil/I, pil/o- Aids in controlling the loss
of body heat.
 Nails- onych/o, ungu/o- Protect the
dorsal surface of the last bone of each
finger and toe.
 Keratin- A fibrous water repellent protein
found in hair and nails
Arrector Pili- “Hair-Raiser” - One of the small fan-shaped
smooth muscles associated with the base of each hair that
contract when the body surface is chilled and erect the hairs,
compress an oil gland above each muscle, and produce the
appearance of goose bumps.
Ch 12 Terms
 albin/o
 derm/o, dermat/o skin
 lip/o fat, lipid
 melan/o black, dark
 myc/o fungus
 onych/o fingernail or toenail
 pil/o hair
 rhytid/o wrinkle
 seb/o sebum
 xer/o dry
Albinism> Any inherited deficiency or absence of
pigment in the skin, hair, and eyes due to an
abnormality of in production of melanin
Dermatitis> Inflammation of the upper layers of skin
Lipectomy> Surgical removal of fat beneath the skin
Melanoma> Malignant skin cancer derived from cells
capable of forming melanin
Mycosis> Any disease caused by fungus
Onychia> Inflammation of the matrix of the nail
Arrector pili> Tiny fibers attached to hair follicles that
cause the hair to stand erect
Rhytidectomy> Surgical removal of excess skin to
eliminate wrinkles; also known as a facelift
Seborrhea> Any of several common skin conditions in
which there is an overproduction sebum (oil)
Xeroderma> Excessively dry skin