Unit 2: Histology, Integument, Bone, Skeleton Flashcards
1
Q
Tissue
A
Group of ells with the same function
2
Q
What are the four main types of tissues
A
- epithelial
- connective
- muscle
- nervous
3
Q
Epithelial tissue
A
lining and coverings
4
Q
Connective tissue
A
supports, protects, and binds other tissues together
5
Q
muscle tissue
A
force (contracts to cause movement)
6
Q
nervous tissue
A
communication (internal)
7
Q
Epithelial Tissue Traits
A
- all very cellular
- polarity to them (polar)
– apical edge (outward edge)
–basal edge (bottom) - avascular (blood vessel)
- highly regenerative (a lot of mitosis)
- functions: protection, exchange, sense (sensitivity-nerve ending)
8
Q
Epithelial Tissues subclasses
A
(named by the number of cell layers and cell shape at the apical layer)
- simple squamous
- simple cuboidal
- simple columnar
- pseudostratified ciliated columnar epithelium
- stratified squamous
- stratified cuboidall (rare)
- stratified columnar (rare)
- transitional
9
Q
Simple
A
1 layer thick (tall)
10
Q
squamous
A
flattened
11
Q
simple squamous
A
- one layer of flattened cells
- good exchange
– (e.g. alveoli of lungs) - good lining
– (e.g. endothelium of blood vessels)
12
Q
What does the endothelium do?
A
keeps blood moving smoothly
13
Q
cuboidal
A
boxy shape
14
Q
simple cuboidal
A
- one layer of boxy cells
- exchange
– (e.g. kindey tubules)
15
Q
Columnar
A
tall cells
16
Q
simple columnar
A
- one layer of tall cells
- absorption and secretion
– (e.g. intestinal lining)
17
Q
pseudostratified ciliated columnar epithelium
A
- one layer of tall (some are taller than others) hairy looking at the top
– (e.g. trachea lining)
18
Q
Stratified
A
multi-layered
19
Q
stratified squamous
A
- muti-layered, flat cells ar apex ledge (free ledge)
- common
- protection
–can be nonkeratinized (e.g. inside mouth)
– or keratinized (e.g. epidermis)
