EPITHELIUM & GLANDS Flashcards
Simple Squamous Epithelium
Location: Mesentery, Blood vessels, Bowman’s capsule of Kidneys, Lungs
Simple Cuboidal Epithelium
Location: Pancreas, Kidney, Ovary, Thyroid
Function: Digestion, Secretion, Absorption
Simple Columnar Epithelium
Location: Gallbladder, Stomach, Colon
Function: Protection, Secretion, Absorption
Nonkeratinized Stratified Squamous Epithelium
Location: Esophagus, Vagina, Mouth
Function: Protection
Note: Nuclei present in apical cell layer of membrane
Keratinized Stratified Squamous Epithelium
Location: Thick Skin, Anal Canal
Function: Protection, Regulation, Sensation
Note: No nuclei in apical layer cells
Stratified Cuboidal Epithelium
Location: Eccrine Sweat Glands, Ducts, Exocrine Glands, Analrectal Junction
Function: Protection, Conduit
Stratified Columnar Epithelium
Location: Salivary Glands, Analrectal junction, Excretory duct
Pseudostratified Ciliated Columnar Epithelium with Goblet Cells
Location: Trachea
Notes: Mucus Movement, Dyenin Protein
Notes: AKA Respiratory Epithelium
Transitional Epithelium
Location: Urinary Bladder
Notes: Non-ciliated, cuboidal when relaxed & squamous when contracted
Zonula Occludens
Specialization: Lateral at Apical Surface
Cytoskeleton interaction: Microvilli
Function: Prevent paracellular & trans cellular transport of ions and water
Proteins: Occludins & Claudins
Notes: AKA Tight Junctions
Zonula Adherins
Function: cell to cell junction
Specialization: Lateral
Proteins involved: Cadherin
Cytoskeleton involvement: Actin
Macula Adherens/Desmosome
Location: under Zona Adherins
Proteins: Cadherins - Desmocollin & Desmoglein
Cytoskeleton interaction: Intermediate filaments
Gap Junction
Location: Epithelium, Cardiac Muscle, Smooth Muscle, Nerve Tissue
Proteins: Connexons
Function: Adjacent cell communication
Hemidesosome
Function: Attachment to basement membrane
Protein: Integrin
Clinical Correlation: Blister forming dx
Mucus gland
Pale stain on H&E
Location: Larynx
