Epithelium

Epithelium

1. Simple

   • Squamous
     • Endothelium
       • Blood vessles, lymphatic tissues barriers, Bowman's Capsule, Loops of Henle, pulmonary alveoli
     • Mesothelium
       • Serous Membranes (Pleural and Abdominal)
   • Cuboidal
     • Exocrine Glands
     • Lining of Ovaries
     • Tubules of Kidney
     • Protective Fx
   • Pseudostratified Columnar
     • Mucociliary Escalator, Respiratory Tract
     • All cells are attached to basement membrane
   • Columnar
     • Ciliated
       • 9+2 arrangement of microtubules, Axoneme
         • Female Reproductive Trace: Oviduct (Fallopian Tubes)
         • Function is to propel fluids and particles along surfae
     • Non-Ciliated
       • Basement Membrane: basal
       • Lumen = apical
       • Function: Protection, Absorption, Secretion (tubules of kidney, intestines, gallbladder, oviducts, uterus
       • Laterally has Junctional Complexes

2. Stratofoed

   • Transitional
     • Urotheliium
       • Exclusively lining the urinary tract
         • Squamous looking at BM, bubble cells at apical
   • Squamous
     • Keratinized
       • Lines cells exposed to the air, no nuclei or DNA at surface
     • Non-Keratinized
       • Moist areas exposed to air
         • Epiglottis, Vagina, Anus, Esophagus
     • Protect against abrasion and dehydration
   • Cuboidal
     • Protective Fumction
     • 2 Layers
     • Goblet cells for secretion and lubrication

3. Membrane Covering body surface, Invaginates to form secretory glands, lines internal cavities