Studied by 22 people
Characteristics of Epithelia
densely packed
little matrix
distinctive cell surfaces
Surfaces of Epithelia
apical, basal, lateral
Basement Membranes of Epithelia
extracellular
porous
avascular
regenerated
attaches epithelia to CT
acts as glue
Functions of Epithelia
protection
secretion
absorption
filtration
diffusion
Epithelial Cell Surface Modifications
microvilli: increased surface area for absorption or secretion
cilia: move materials across cell surface
Functions of Simple Epithelial Cells
diffusion
blood filtration
secretion
absorption
Functions of Stratified Epithelial Cells
protection
Functions of Pseudostratified Epithelial Cells
secretion
mucus movement
Functions of Squamous Epithelial Cells
diffusion
filtration
Functions of Cuboidal/Columnar Epithelial Cells
secretion
absorption
may include goblet cells
Goblet Cells
produce and secrete mucus
Glands
epithelium with supporting network of CT
endocrine and exocrine
Simple Squamous Epithelia
diffusion
filtration
secretion
endothelium
serous membranes
alveoli
bowman's capsule
Simple Cuboidal Epithelia
secretion
absorption
kidney tubules
glands+ducts
ovary surface
Simple Columnar Epithelia
movement
secretion
absorption
glands
bronchioles
uterus + uterine tubes
stomach
intestines
gallbladder
ventricles of brain
Psudostratified Columnar Epithelia
synthesize+secrete+move mucus
absorption
protection
lining of most of upper respiratory tract (ciliated)
male urethra and epidymis (non-ciliated)
Stratified Squamous Epithelia
protection
keratinized: skin non-keratinized: mouth, throat, esophagus, anus, vagina
Transitional Epithelia
regulation (fluid volume)
protection (against urine)
lining of urinary system
Connective Tissue Characteristics
abundant
consists of cells separated by extracellular matrix
mostly vascular
supports extracellular matrix
Connective Tissue Functions
encloses organs as a capsule
connects tissues
storage
insulation
transportation
protection
Extracellular Matrix
protein fibres + ground substance
Extracellular Matrix - Protein fibres
collagen: strong, flexible, inelastic
reticular: fill space, fine collagenous, form branching networks
elastic: made from elastin, crosss linked
Elastin
protein surrounded by fibrillin (a glycoprotein)
Extracellular Matrix - Ground Substance
hyaluronic acid: reduces friction
proteoglycan: long protein core with many polysaccharides
adhesion proteins: fill in space, attach fibres (to cell walls and each other)
Loose CT
areolar: mostly collagen; fills in space
adipose: from adipose cells; store fat
reticular: from reticular fibres; form structures in lymphatic system
Dense CT
regular: fibres line up irregular: fibres in many directions
Note 
Flashcard (40)