chapter 2 - specific parts Flashcards
strata (burned)
basale
- deepest portion of epidermis
– One Cell thick – one – one moves up (growth)
– Melanocytes
– Melanoma – cancer with melanin cells (bad cancer) spread like crazy
– 40% of it develops for moles
– These cells sit on the basement layer
– Basale cell carcinoma – most common skin cancer
strata (sun)
spinosum
– 8 to 10 cells thick
– Making keratin fiber
– Second most common cancer in skin layer – squamous cell carcinoma
strata (get)
granulosum
– Granules being produced with contain some fat, which helps us stay waterproof
- Cells start to die
stratum (let’s)
lucidum
- only in Palms and soles (skin is a little thicker) extra few layers for protection
stratum (come)
corneum
– 25+ layers of cells – where calluses are involved
– These cells are dead and are falling off
– Cornified cells – really thick group of cells
pigments (3 causes)
1) melanin – mainly genetic, but also how much sun you are exposed to, also hormones
2) carotene - yellow pigments – from vegetables – usually found in your palms
3) jaundice - eyes or skin look a little yellow because your liver isn’t processing the things and needs to
blood circulation (2 factors)
1) cyanosis - start looking a little blue due to lack of oxygen, could also look slightly red because of exercise
2) erythema - also a reddish color – if you have a fever, allergies, allergic reaction
Thickness
build up of cells (corneum)
Areas can be yellowish
dermis structure - contains
– Lots of connective tissue, which gives lots of strength
– Nerves, blood vessels, hair, follicles, smooth, muscles, glands, and lymphatic vessels
dermis structure - sensory functions
Itching, tickling, pain, temperature, touch, pressure, two point discrimination
2 layers of dermis structure (papillary)
- 1/5 - outer
– Has connected tissue with with elastic fiber – elasticity – wrinkles
– Also has bumps – gives us fingerprints and prints
– Capillaries – blood
– Some touch and pain
