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Important Definitions
skin: a
protective layer
that covers the
body
epidermis: the
outer layer of
skin
tiny muscle:
small muscle
located under
skin
oil gland: a
gland that
secrets oily
substances
dermis: the
inner or middle
layer of skin
sweat gland: a
gland that
secrets sweat
hair: filaments
(thread like
structure)
growing from
the skin
hair follicle:
skin organ that
produces hair
nerve: special
structures that
sense touch
hypodermis
(subdermis):
the bottom
layer of the
skin made of
fatty tissue
blood vessel:
a vessel which
blood
circulates
Integumentary
system: a
system that
protects the
body from
damage, made
up of the skin
and its
appendages
(fingernails,
toenails, and
hair)