Simple Epithelium

1. Simple Epithelium • Simple squamous • Single layer of flat cells • Usually forms membranes • Lines body cavities • Lines lungs and capillaries

2. Simple squamous epithelium

3. Connective tissue Smooth Muscle Blood cells Simple squamous lining of artery (blood vessel)

4. Simple Epithelium • Simple cuboidal • Single layer of cube-like cells • Common in glands and their ducts • Forms walls of kidney tubules • Covers the ovaries

5. Simple cuboidal cells

6. Simple Epithelium • Simple columnar • Single layer of tall cells • Often includes goblet cells, which produce mucus • Lines digestive tract

8. Simple columnar epithelium

9. Simple Epithelium • Pseudostratified • Single layer, but some cells are shorter than others • Often looks like a double cell layer • Sometimes ciliated, such as in the respiratory tract • May function in absorption or secretion

11. Trachea lining Cilia Ciliated pseudostratified columnar epithelium

12. Stratified Epithelium • Stratified squamous • Cells at the free edge are flattened • Found as a protective covering where friction is common • Locations • Skin • Mouth • Esophagus

14. Stratified squamous epithelium of epidermis of skin. This is the un-keratinized kind.

15. Stratified squamous epithelium of epidermis of skin. This is the dried out or keratinized kind.

16. Stratified Epithelium • Transitional epithelium • Shape of cells depends upon the amount of stretching • Lines organs of the urinary system

17. Adipose Smooth muscle Transitional epithelium Transitional epithelium Lining of ureter

18. Transitional epithelium Lining of ureter