Please enable JavaScript.
Coggle requires JavaScript to display documents.
Lecture 1 (Skin (two layers (Epidermis (basal cell (adjoin dermis and…
Lecture 1
Skin
also called cutaneous membrane
prevents water loss
Functions of skin
regulates body temp
helps make vitamin D
involves sensory
barriers against microorganisms
two layers
Epidermis
bloodless
4 to 5 layers
basal cell
adjoin dermis and epidermis
divide continuously
push offspring towards surface
absorb melanin
filled with waterproof protein keratin
hardened form of keratin make up hair and nails
Dermis
tough leathery structure
made up of loosely packed cells
consisting of
small muscles
sweat glands
sebaceous glands
blood vessels
nerve endings
hair follicle
connects protein fibers
2 meters of skin make up one organ
Microbiome
yeast and bacteria tolerant
normal residents of body
compete with pathogens for nutrients
produce chemicals that interfere with growth
grow in small clusters
waste produces body odor
surface of skin
inhospitable environment
covered with salt and sebum
sebum
oily lipid secreted by sebaceous glands
barrier that acts as antimicrobial
skin sloughs off attached microbes
Hypodermis
layer of fat cells
sabers beneath the dermis
technically not part of skin
stored fat
provides energy
cushioning
insulation
fibers anchor underlying tissues
Diseases
malassezia
member of microbiome
digest sebum
rarely pathogenic
gram pos also grow on skin
most common species on skin
diphtheroid
gram pos bacteria on skin
pleomorphic bacilli are named by appearance
usually nonpathogenic
acne caused by fermentation of carbs