A&P 1 exam 2 (part 2)
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A&P 1 exam 2 (part 2)
anatomy fall 2014
The integument fall 2014
the integument is a?
very large organ
what accounts for 7% of body weight and is made of layers
outerlayer of integument, epithelial layer is derived from ectoderm
comes from mesoderm
below dermis, is merely a layer of adipose tissue that the dermis sits on
functions of integument?
vitamin D production
protection from UV
from water loss and mechanical damage
ex of mechanical damage?
friction, rubbing, being struck(hit)
integument temperature regulation?
maintain high, constant body temp
3 things that temperature regulation does in the integument?
body looses heat
if body looses heat?
bring more blood to surface (dilate cappilaries)
if body conserves heat?
reduce blood to surface (constrict capillaries)
evaporates and cools you down (evaporative cooling)
sucks body heat out
first layer? 2nd layer? 3rd layer?
hypodermis is ___ a part of the integument
integument protection from UV?
filter out with radiation bc cells are sensitive to it
boarding of body wastes
waste products are harmful
converted into ammonia, then ammonia is then added into perspiration to get rid of nitrogenous wastes
integument sensory reception?
to gather specific things on the external environment and place them on the surface
epidermis is a ?
bottom layer of epidermis?
made up of single layer of cells
base layer of epidermis
produces all the cells found in the other 4 layers
during cell division in epidermis what happens?
the new cells get pushed up from bottom (stratum basale)
thicker layer in epidermis that appears to have spiny projections under microscope
cells aquire a protein called ______. The cells are also going to die which means they aren't going to come back , what part of epidermis?
clear, cells acquire short hill appearance and cells continue to get pushed up to upper surface
stratum lucidum of epidermis
closely packed dead cells
stratum corneum of epidermis
in the stratum corneum the cytoplasm is replaced by _____, and the cell is full of ____
in the stratum corneum, the outer layer is made up of____ ? the cells on top eventually are ____
accumulation of keratin
5 layers of epidermis?
2 pars of melanocytes?
this can block UV radiation
derivatives of the neural crest produce pigments of
2 options tanning?
tanning is a ?
connective tissue of epithelium of epidermis
2 layers of dermis?
tense irregular connective tissue proper?
has a lot of collagen fibers
outermost, uneven layer that has fingerlike projections, has ridges on epidermis
papillary layer of dermis
ridges on epidermis and are a property of dermis are reffered to as?
dense irregular connective tissue proper
reticular layer of dermis
papillary layer can often be found on ?
fingers, palms, feet for friction and extra grip
also could be your finger prints
dermis layer help integument from being?
2 types of muscles of dermis?
smooth, and don't have control of contractions
arrector pilli or dermis (muscle)
ex of arrector pili?
hairs standing up
getting goose bumps
formed below dermis and do have control over, theyre going to move skin
striated muscles of dermis
specific location where striated muscles can be found?
in face for facial expressions and nonverbal communications
epidermal derivatives are found in ?
tube of epidermis that sinks into dermis of cells
takes place at end of hair follicle from shaft
movement of pursion?
no melanin in hair follicles then?
glands that are going to stick out of side and makes sebum
oily substance that works it way up to surface to keep hair and skin from drying up, can kill some bacteria
epidermal tube involved in evaporative cooling and excretion
2 things that make up nails/
stratum coreneum and stratum lucidum of nails are?