A&P unit 1 Flashcards
Tissue
collection of cells that preform a specific function
Polarity
Refers to the structural and functional differences between the exposed and attached surfaces.
Transitional epithelial
A mixture of cubodial and squamos : Goes from cubodial to squamos
An example of this would your bladder stretching to squamos when it is time to be released.
Gap Junction
Send signals and coordinates tissue, channels are connecting to each other and there cytoplasm is connected throughout the cell.
Regeneration
shedding, differentiation, proliferation
What are epithelial tissue categorized by?
Layers and shape
Simple squamos
Located in protective places, good for absorption and diffusion, really thin, good for gas exchange and controlling friction (one layer)
Stratified squamos
Really squishy
skin has alot of this
it is protective
Simple cubodial
Good for holding things in there shape
Occurs where secretion and absorption take place
Good for glands
Not as squishy
Has a rigid shape
Stratified cubodial
Same as simple cubodial, but has more layers
Simple columnar
Located in the small intestine/ stomach
Happens where absorption and secretion take place
Protects from chemical stresses
Stratified columnar
providing protection along portions of the pharynx, epiglottis, anus, and urethra, as well as along a few large excretory ducts.
It has 2 or more multiple layers
Helps food go down smoothly
What are the three categorize of epethilial tissue
Cubodial, squmaos, columner
Tight Junction
Two plasma membrane bound together from membrane proteins
Prevents water and solutes from passing between cells
Example: Tight junctions in digestive tract keep waste and enzymes in the lumen away from bisolateral surface and digesting
Extracellular protein fibers
collagen
retecular fibers
elastic fibers
Axial skeleton
focusing on the middle of the body (skull, ribcage)
apendicular skeleton
Focuses on apendages (skin, arm, hand)
superior
top of body
inferior
bottom of body
anterior
front of body
posterior
back of body
lateral
outside the body
medial
middle of the body
proximal
closer to axial skeleton
distal
further away from axial skeleton
Negative feedback
Helps ensure the appropriate reaction is occurring and gives the systems of the body a state of equilibrium
Our bodies preform negative feedback
reticular fibers
can be found surrounding the kidneys and liver
holds organs in place
provides structural support
collagen fibers
squishy fiber
provides structural support
we find it in our skin, joints
hold the vows in the heart in place
Adipocytes
Really large vessicle that stores fat
Example: When a fat person looses weight they end up with a lot of skin because the adipocytes cells shrink the skin it does not just go away
Mast cells
send signals to tell macrophages to move.
macrophages
picks up waste
eats up stuff
picks up bacteria
fibroblast
Only cells that are always present in connective tissue
Secrete proteins
makes fibers depending on where they are
mesenchymal cells
grows into other specialized cells
Types of connective tissue
connective tissue fiber, fluid connective tissue, supporting connective tissue
Aerola tissue
Loose tissue because it does not contain much fiber. surrounds stuff like the digestive, respiratory, and urinary tract.
Adipose tissue
stores fat and has adipocytes
Reticular tissue
Looks like broken spider webs
Loose connective tissue proper
made up of mostly cells
osseus tissue
AKA bone tissue
made up of mostly calcium
protects other tissue from damage
Hyaline cartilage
A supporting connective tissue
Found in places that need cushion like our joints
can be found at the end of long bones to reduce friction
fibocartilage
It is dense and holds more weight
Connective tissue proper regular
defined by dense collagen fibers
made up of fibroblast
They go in the same direction and take up majority of the tissue
Connective tissue proper irregular
made up of collagen fibers
the main cell types is fibroblast
is found under the skin
irregular tissue fibers go in a irregular pattern.
