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22 Cards in this Set

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name layer below epithelium/basement membrane
basement membrane, superficial to desnse irregular connective tissue
basic energy reaction
fule + oxygen ---> ATP + corbon dioxide + water
Whta process is involved for stuff to get through to the epithelium?
diffusion
which embryonic germ layer gives rise to 4 primary tissue types
embryonic - includes endoderm, mesoderm & ectoderm
Papillary region of ?
top 1/5 = Papilllary
-the superfical portion
= areolar connective tissue w/elastic fibers, contains: 1) dermal papillae that houses capillaries, 2) corpuslce of touch 3) free nerve endings
Reticular region of ?
deepr portion (about 4/5) = Reticular
-= desne irregular connective tissues w/collagen bundles & some leastic fibvers; spaces in bewteen cotaint hari, nerves sebaceous glands, sudoriferous glands & fat cells
Dermis cells
fibroblasts, macrophages & adipocytes
- blood vessels, nerves, glands & hair follicles are also embedded in dermal tissues
what structures are found inthe dermal papillae & their specific functions?
1) dermal papillae that houses capillaries, 2) corpuslce of touch 3) free nerve endings
*dermal papillae grealy increase the surface area (small finger like projections), they indent the epidermis
-in some you can find Meissner corpuslces (outouch), nerve endings taht are sensitive to touch, & free nerve endings
Stratum Spinosum
= 8 ~ 10 rows of polysided
Stratum Basale
= deepest layer of epidermis
= 1 single row of cuboidal/columnar keratinocytes
-***whegre stems cells undergo cell dvions to produce new keratonobyes,\-**8where melanocytes, Langehan clles 7 Merkel cesll associated with touch are sctattered among keratinoytes
Stratum Spinosum
= 8 ~ 10 rows of polysided
Stratum Basale
= deepest layer of epidermis
= 1 single row of cuboidal/columnar keratinocytes
-***whegre stems cells undergo cell dvions to produce new keratonobyes,\-**8where melanocytes, Langehan clles 7 Merkel cesll associated with touch are sctattered among keratinoytes
Stratum Granulosum
= 3 - 5 rows flattened keratonicytes, organells beginning to degenrate, cells contiantin keratohyalin, converts tonofiliametns into keratin, lamellar granules, release a lip-rich water-repellent secretion
Stratum Lucidum
*** - present only in : fingertip, palsm & soles
- = 3 to 5 rows of clear, flat dead keratonocytes w/large amts of keratin
Stratum Corneium
= 25- 30 rows of dead flattened keratinocytes
- continuously shed & replaced by cells from deeper strata
-betwen cells are lipds from lamellar granules that help make this layer an effective water-repellent barrier
-thsi is also where callus are formed!(contian mostly keratin)
what provides skin w/strenght, extensibility (stretchabiligy & elasticity)?
collagen _ elastic fibers in the reticular region
Langerhan cells
= immune
Merkell cell
sensory & tactile
6 functions of skin
1. regulates boyd temp
2. protects from extl environ
3. excretes & absobs
4. helps w/vit D synthesis
5. provides sensation
6. cutaneous sensation
subcutanesou (subQ) layer aka
hyupodermis
= areolar & adipose
-has fat & blood vessels
-also has lamellated (Pacinian) corposuscles) that are senstiive to pressure (deep pressure!)
What is epidermis made of? (1 million $ quesitons)
keratinized stratified squamous epithelium
what 4 cells does it contsist of ?
LM