Lab Exercise Classification of Tissues: Epithelial Tissue Tissue: a collection of similar cells working together Epithelial Tissue: cells that line the cavities and surfaces of organs & structures

Classification of Epithelia 1. Number of cell layers

2. Shape of the cells

Lumen: The open space above the apical surface of a structure Epithelial Tissue Connective Tissue Basement Membrane

Lumen: The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine. Apical Surface Connective Tissue LUMEN Epithelial Tissue Basement Membrane

I will use BOTH microscopes AND diagrams to test you on epithelial tissues. Make sure you look at the microscopes in lab and the diagrams in this presentation.

Simple Squamous Epithelia Alveoli (air sacs) of Lungs

Simple Squamous Epithelium

Simple Cuboidal Epithelia Kidney Tubules

Simple Cuboidal Epithelium

Cross Section through the Small Intestine Lumen

Simple Columnar Epithelium

Stratified Squamous Epithelia Skin

Stratified Squamous Epithelium LUMEN

Pseudostratified Ciliated Columnar Epithelia Trachea (cross section) Lumen

Pseudostratified Ciliated Columnar Epithelium LUMEN Cilia

Transitional Epithelia Urinary Bladder Lumen Lumen

Transitional Epithelium LUMEN

Name this tissue.

Simple Cuboidal Epithelium Found where? Can you identify the lumen? Apical and basement membrane?

Name this tissue

Stratified Squamous Epithelium Where in the body is this found? Can you find the lumen/apical surface/basement membrane? What is found under the basement membrane?

Name this tissue

Transitional Epithelium Where can you find this in the body?

Name this tissue.

Simple Squamous Epithelium Note it’s just ONE layer of flat shaped cells! Where in the body do you find this epithelium?

Name this tissue.

Simple Squamous Epithelium (again!)

Name this tissue

Simple Columnar Epithelium The cells labeled “G” are goblet cells. What do they make?

Name this tissue.

Pseudostratified Ciliated Columnar Epithelium Do you see the cilia? Where in the body can you find this epithelium?

Name this tissue

Simple Squamous Epithelia Found in the alveoli of lungs, walls of capillaries

Epithelia Image Gallery

Simple Squamous Epithelia

Simple Squamous Epithelia

Simple Cuboidal Epithelia

Simple Cuboidal Epithelia

Simple Cuboidal Epithelia

Simple Columnar Epithelia: pointer is on the basement membrane

Simple Columnar Epithelia: pointer is on a goblet cell

Simple Columnar Epithelia

Simple Columnar Epithelia

Stratified Squamous Epithelia: pointer is on the basement membrane

Stratified Squamous Epithelia: pointer is on the basement membrane

Stratified Squamous Epithelia

Stratified Squamous Epithelia

Stratified Squamous Epithelia

Pseudostratified Ciliated Columnar Epithelia: pointer is on the basement membrane

Pseudostratified Ciliated Columnar Epithelia

Pseudostratified Ciliated Columnar Epithelia

Pseudostratified Ciliated Columnar Epithelia

Transitional Epithelia: pointer is on the basement membrane

Transitional Epithelia: pointer is on the basement membrane

Transitional Epithelia

Transitional Epithelia