Epithelial Tissue :
1. Simple epithelium: is composed of a single layer of cells resting on abasement membrane.
2. Compound epithelium: consists of two or more cell layers and has protective function. Simple:
• Composed of single layer of cells.
• Functions as lining for body cavities, ducts and tubes.
1. Squamous
• single thin layer of flattened cells.
• found in walls of blood vessels, air sacs of lungs for diffusion.
2. Cuboidal
• single layer of cube like cells.
• found in ducts of glands and tubular parts of nephron for secretion and absorption.
3. Columnar
• single layer of tall and slender cells.
• free surface may have microvilli.
• found in lining of stomach and intestine for secretion and absorption.
4. Ciliated
• columnar or cuboidal cells with cilia.
• move particles or mucus in specific direction, in bronchioles, fallopian tubes.
