1. Simple Squamous Epithelium • Absorption • Secretion • Filtration

2. Glands, ducts Walls of the kidney tubules Surface of the ovaries Simple Cuboidal Epithelium

3. Simple Columnar Epithelium Goblet cells secrete mucus that aids in the function of respiratory system

4. pseudostratified columnar ex. goblet cells, respiratory • All the cells rest on the basement membrane • Since some of the cells are shorter then others, the nuclei appear at different heights

5. Stratified Squamous (keratinized and non-keratinized) • Stratified Squamous Epithelium: Most common stratified epithelium in the body • Squamous at the free edge and columnar or cuboidal at the basement membrane • Sites of abuse or friction: esophagus, mouth and outer portion of the skin, the outer surface of skin is keratinized (surface cells contain keratin, a tough protective protein)

6. Keratinized vs. Nonkeratinized

7. Stratified Cuboidal • Stratified Cuboidal and Columnar Epithelium usually just two cell layers • Fairly rare in the body; mainly ducts of large glands • Sweat glands • Mammary glands

8. Transitional Epithelium • highly modified stratified squamous: urinary bladder, ureters, urethra. • All these organs are part of the urinary system and are subject to considerable stretching