Tissues (Epithelial & Connective) Flashcards
• Groups of cells with similar structure and function
Tissues
– study of tissues
Histology
Four primary types of Tissues
E, C, M, N
- Epithelial tissue (epithelium)
- Connective tissue
- Muscle tissue
- Nervous tissue
How many layers is Simple
One layer
How many layers is Stratified
2 or more layer
3 shapes in simple and stratified layer:
S, C, C
Squamous, Cuboidal, Columnar
Pseudostratified
Modify simple
Transitional
Modify stratified
shape in Pseudostratified
Columnar
shape in Transitional
Cuboidal to Columnar
3 types of Simple epithelium
Simple squamous epithelium
Simple cuboidal
Simple columnar
4 types of Stratified epithelium
Stratified squamous epithelium
Stratified cuboidal
Stratified columnar
Stratified cuboidal & columnar
type of Transitional epithelium
Modified stratified squamous epithelium
Cover and line body surfaces
Covers external body surface
epithelial tissues
Often form sheets with one free surface, the apical surface, and an anchored surface, the basement membrane
epithelial tissues
Locations of Epithelial Tissue
BC, BL, GT
- Body coverings
- Body linings
- Glandular tissue
Functions of Epithelial Tissue
P, A, F, S
- Protection
- Absorption
- Filtration
- Secretion
Avascular means
no blood supply
Involved in the beginning formation of the gametes
epithelial tissues
Regenerate easily if well nourished
epithelial tissues
refers to a wet to dry dressing can help with re-epithelialization of the wound
can be treatable
Bed sore
GLANDS composes 3 secreting parts:
E, E, D
Endocrine
Exocrine
Ducts
Duct
Exocrine
Produces hormones; ductless
Endocrine
carrying the secretion of a gland or oil
Ducts
flattened, like fish scales
Squamous
cube-shaped, like dice
Cuboidal
shaped like columns
Columnar
In simple epithelial tissues, it is a diffusion and filtration and also secretion in serous membranes
Squamous
In simple epithelial tissues, it is a secretion and absorption; ciliated types proper mucus or reproductive cells
Cuboidal and Columnar
In simple epithelial tissues, no simple transitional epithelium exists
Transitional
In stratified epithelial tissues, it is a protection
Squamous
In stratified epithelial tissues, it is a protection ; rare in humans
Cuboidal & Columnar
In stratified epithelial tissues, it is a protection; stretching to accommodate distension of urinary structures
Transitional
- Functions in absorption, secretion, and filtration
- Very thin
- Not suited for protection
Simple epithelia
Single layer of flat cells
Functions in diffusion, filtration, or secretion in membranes
Simple squamous epithelium
Single layer of cubelike cells
Functions in secretion and absorption; ciliated types propel mucus or reproductive cells
Simple cuboidal epithelium
hair-like projection that is helpful in mobilizing mucus
Ciliated
Single layer of tall cells
Functions in secretion and absorption; ciliated types propel mucus or reproductive cells
Simple columnar epithelium
G__ cells secrete mucus
Goblet
Modification of simple epithelium
Single layer, but some cells are shorter than others giving a false (pseudo) impression of stratification
All cells rest on a basement membrane
Functions in absorption or secretion
Pseudostratified columnar epithelium
- Consist of two or more cell layers
* Function primarily in protection
Stratified epithelia
Most common stratified epithelium
Named for cells present at the free (apical) surface, which are squamous
Functions as a protective covering where friction is common
Stratified squamous epithelium
change
primarily in the skin
composed of numerous layers of dead squamous cells
primarily in the skin
Keratinized
not marked by the formation to keratin
moist
mouth, throat, larynx, esophagus, anus, vagina, inferior urethra, cornea
Nonkeratinized