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NUR218 EXAM 2, LECTURE 8
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NUR218 EXAM 2, LECTURE 8Outermost layer, thinnest; avascular; regenerates every 4-6 weeks
What is the epidermis?
stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum
basale
What are the layers of the epidermis from TOP to BOTTOM?
contains connective tissue + elastin + collagen; responsible for skin's characteristic
elasticity
What is the dermis?
large vascular supply --> nutrition for epidermis; contains sensory nerve fibers that
respond to touch, pain, temp; sebaceous and sweat glands, hair and nail follicles,
nerves lymphatics
What are characteristics of the dermis?
attaches dermis to muscles and bones; blood supply delivered to dermis; insulation;
cushions deeper body parts; reservoir of energy
What does subcutaneous fat do?
epidermal cells in dermis
What is hair made of?
capillary loop at the follicle's base that supplies nourishment
What is the papilla of the hair?
, respiratory --> if you are not getting enough oxygen, nails will be blue or clubbed
What system of the body can be examined by observing the nails?
produce sebum to help keep skin and hair lubricated; very high concentration on face
and scalp
What are sebaceous glands?
eccrine, apocrine
What are the two types of sweat glands?
major sweat glands found almost everywhere on body; high concentration on palms,
soles, and forehead; important role in temp regulation
What are ECCRINE sweat glands?
bero sbMeU locality -hair follicle; armpits, nipples/areola, eyelids, external ears, groin,
genitals; begin secretion AT PUBERTY, strongly influenced by hormones; responsible
for body odor
What are APOCRINE sweat glands?
protection; barrier to hazards; self-perception, body image, self-expression, cultural
identity; sensation; temp regulation; wound repair; fluid and electrolyte regulation;
absorption & waste excretion; vit D production
What are the nine functions of the skin??
non-symmetrical or symmetrical?
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