1. The microscopic study of tissue. It is important to know the structure and function of tissues In order to understand how individual cells are organized And how tissues work to form organs and organ systems.

2. Learner Objectives To analyze the relationships between the structures and functions of tissues. To evaluate the cause and effect of disease and trauma on the structure and function of tissues. To research embryological development of tissues.

3. Epithelial Tissues Overall classification is based on the fact that they have very little extra-cellular matrix between the cells. These tissues cover organs, form structures, and has a “free surface.” They all have basement membrane – opposite the free surface; binds cells to underlying tissues. Blood supply does not penetrate the basement membrane. Diffusion of all gasses and nutrients; cells close to basement membrane are active, and those further away will die in stratified tissue.

4. Classification of Epithelium – by number of cell layers and the shape of cells. Simple Stratified Pseudostratified Squamous Cuboidal Columnar Transitional

5. Cell Surfaces 1)Free surface – faces away from underlying tissue 2)Lateral - surfaces which face other cells 3)Basal – surface facing the basement membrane If the free surface is smooth: If the free surface has microvilli: If the free surface has cilia: