EPITHELIAL TISSUES Flashcards
★ type of animal tissue that forms the inner and outer
lining of organs, the covering in surfaces, and the
primary glandular tissue of the body.
EPITHELIAL TISSUES
forms a continuous intercellular barrier between the
epithelial cells
TIGHT JUNCTION
helps maintain the integrity and function of the
tissues
TIGHT JUNCTION
composed of dierent and complex proteins that helps
seal dierent epithelial tissue
known as?
○ claudins, occludin, JAM A (junctional admission
molecule)
★ aka occluding junction
TIGHT JUNCTION
★ paracellular
○ like cell membrane, semi-permeable
○ travels through the space
○ travels through the cell
★ transcellular
★ finger-like structure
★ faster absorption
★ non-motile
MICROVILLI
★ hair-like
★ motile
★ seen in the fallopian tube
CILIA
○ buntisan weak cilia, remove fallopian
tube
ectopic pregnancy
★ seen in the ears
★ specialized microvilli
★ hair-like structure
★ have balance and to hear
STEREOCILIA
★ simple - single-layer
★ flat, scale-like
SIMPLE SQUAMOUS EPITHELIUM
air sacs or alveoli, capillary walls
SIMPLE SQUAMOUS EPITHELIUM
★ can move via passive diffiusion
SIMPLE SQUAMOUS EPITHELIUM
★ cube-shaped
★ absorption and secretion
SIMPLE CUBOIDAL EPITHELIUM
★ glands and their ducts, ovaries, and lining of kidney
tubules
SIMPLE CUBOIDAL EPITHELIUM
absorption and secretion; contains goblet cells that
secrete mucus
○ stomach has acid and produces mucus
★ walls of the gastro-intestinal tract and body cavities
(stomach and small intestine)
SIMPLE COLUMNAR EPITHELIUM
★ lining of the respiratory tract (fallopian tube)
★ absorption and secretion; usually ciliated (with hair-like
projections called cilia); cells have unequal length and
position of nucleus forming a false (hence, pseudo-)
layering of cells
PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
epidermis, lining of mouth, esophagus, and vagina
★ protection against abrasion or constant exposure to
friction
STRATIFIED SQUAMOUS EPITHELIUM
○ does not have keratin
○ moist tissue
○ vagina, esophagus, anal
○ flexible
★ non-keratinized
○ has keratin
○ outer layer of the skin - epidermis
keratinized
★ endocrine system (sweat glands, salivary glands,) and
mammary glands
STRATIFIED CUBOIDAL EPITHELIUM
★ protection and secretion
★ acts as a barrier to choose the nutrients and waters that
can go in the cell - gatekeepers
STRATIFIED CUBOIDAL EPITHELIUM
male urethra and ducts of some glands
○ pharynx, anus, conjunctiva
○ conjunctiva - secretes tears to protects the eyes
★ protection and secretion
STRATIFIED COLUMNAR EPITHELIUM
★ rare type of epi tissue
STRATIFIED COLUMNAR EPITHELIUM
