1/19/16 homeostasis -Stable internal operating conditions within the body
ex. temperature so blood ph (3/75) integument-protective outer covering of
at the body a. functions
-protection from abrasion, bacterial attach,
ultraviolet radiation, dehydration - helps control internal temperatures
-sensory receptors detect environmental
Stimuli b. structure of skin tosis
- epidermis Dunn
L several layers of cells (living cells
Listratum basale: inter- always dividing) on most layer of epidermis (mitotic)
Don't forget about the age old question of What is the difference between primary succession and secondary succession?
Somelanocytes darven the suin / protect
against uv rays Lystratum corneum outermost o layer (dead skin cells), flattened.
dead cells keratin - dermis
7 mostly connective tissue composed
of collagenlelastin (proteins) Lihouses blood vessels, lymph vessels,
Oil/sweat glands,sensorynerves C.sweat glands, oil glands, hair arrector
pili muscles a
- sweat slands produce fluid in response If you want to learn more check out What are aerosol particles in the atmosphere?
to stress (fright, overheating) -oil glands lubricatelsoften the skin, We also discuss several other topics like What is responsible for transmission of hereditary material?
produce secretions that reduce bacterial populations
DUST MITE leat deadskin
) Study Soup
1/19/16 - hair.root embedded in dermis -arrectorpili: smooth muscles that are attached to hair follicles (goose bumps) If you want to learn more check out Why did hester prynne name her child pearl?
ex. hypertrichosis... genetic
condition, causes exess
shairgrowth oil glands: 88 (dot in the middle)
ca) Study Soup
(elongated donut) 1/21/16 WRINKLES...
cl. skin cancer
- most common form of cancer in the us
3/2 of cancers found each year Obasalcell carcinoma Don't forget about the age old question of Who is the father of western civilization?
squamos cell carcinoma
o malignant melanoma - melanoma: accounts for almost 3/4
deaths due to skin cancer
5yearsurvival rates localized - 98%. bsregional -62%
Lydistant -15% @ muscoskeletal system
a. homans have an endosueleton composed
of bone/cartilage Tresist compression) (b. cartilage
-hyaline cartilage: tracheal rings, end of lacuna nose, end of sternum, inarticulating joints. Don't forget about the age old question of What should you consider the country of origin of the t-shirt you are wearing?
(buffer between bones)
-elastic cartilage: external ear chondrocyte - fibrocartilage: foundio intervertebral
1121/16 c.bone structurelfunctions.
interact w/muscles to move the body support protect (sive us overall form) depository (calcium important)
blood production (marrow producing red/
90 white blood cells) -bone structure de
is compact bone: found on outside of bone
> osteocytes(bone cells): found in compact
bonelhoused in lacunae lamellae Shaversian systems found in compact osteocyte 2 bone composed of concentric circles.
canaliculi called lamellae
@center of each Haversian system haversian canal
is the haversian canal: contains blood
vess elsinerves is canaliculitiny channels that connect
haversian canals to osteocytes.
spongy bone: found mostly in epiphysis, contains red marrow that produces
blood cells CLICKER QUESTION: Which of the following is true? son
C.cartilage heals more slowly than bone arb. bonelcartilage cells are housed in
lacunae moal d. there are numerous Haversian systems in
eaach section of compact bone
-bone formation and remodeling
Istart with cartilase model-secretions made by osteoblasts (osteocytes) become mineralized a