Please enable JavaScript.
Coggle requires JavaScript to display documents.
Integumentary System (Anatomy) - Skin - Coggle Diagram
Integumentary System (Anatomy) - Skin
EPIDERMIS
other cells:
Langerhans cells
: in spinosum, for immune response
Merkels cells
: in basale, for tactile
Melanocytes
: n basale & hair follicles,
produce melanin (protection against UV)
Thick vs Thin Skin
Thick
consists of all 5 layers
:check: sweat glands, stratum lucidum
:green_cross: hair & sebaceous glans
on palms of hand, soles of feet, finger & toes
Thin
:green_cross: stratum lucidum
:check: sweat gland, hair follicles, sebaceous gland
covers most of body
Structure
: Stratified squamous
keratinized epithelium (keratinocytes)
DERMIS
layers:
P
enawar
R
indu
Papillary Region
superficial layer (about one-fifth)
contains dermal ridges that house blood capillaries,
corpuscles of touch and free nerves ending
:check: areolar tissue with thin collagen & elastic fibers
Reticular Region
:check: dense irregular c.t. with bundles of thick
collagen & some coarse elastic fibers
spaces between fibers contain: adipose cells, hair follicles, nerves, sebaceous glands & sudoriferous gland
deeper layer (about four-fifths)
Structure
much thicker than epidermis; thickness varies
from region to region in the body
has great tensile strength & ability to stretch and recoil easily
deeper part of the skin
layers of
EPIDERMIS
C
ow
L
oves
G
rass
S
o
B
ad
Stratum Granulosum
cytoplasmic granules of keratinocytes
for keratinization :arrow_right: promotes cell dehydration
:arrow_right: cells become anucleated (dead cells)
:check: keratohyalin
Stratum Spinosum
cull junc: desmoseome
:check: Langerhans cells (immune)
cytoplasmic processes
Stratum Lucidum
only in thick skin
anucleated, keratinized
Stratum Basale
:check: keratinocytes (contain melanin)
:check: basal cell
cell junc: desmosome (cell-to-cell adhesion)
:check: Merkel cells (tactile/touch)
the only later that undergoes division (mitosis)
:check: melanocytes (produce melanin)
Stratum Corneum
anucleated, keratinized
water barrier
outermost