Epithelial Tissue Lab

Examples of images and

other useful information!

Human Skin - Normal

Lumen = Open Space

Stratified Squamous Epithelium – Keratinized

Basement Membrane

Connective Tissue

Normal Skin vs. Skin Cancer (Squamous Cell Carcinoma)

Squamous cells are growing “down” into the connective tissue. Problem = Inadequate blood supply to all epithelial tissue.

Human Lung - Alveoli

Simple Squamous Epithelial Tissue

Lumen = Air Space

Capillary = small blood vessel

Basement Membrane = to small to see!

Human Lung - EmphysemaAlveoli (SSE) have broken open, enlarging the lumen (air space)

Problem: Less surface area for O2 and CO2

exchange.

Human Kidney- NormalSimple Cuboidal Epithelium – allows for filtration of water and salts.

Lumen – collecting duct for excess water and salts.

Basement Membrane

Connective Tissue (very little)

Kidney Carcinoma – Various Types

Irregular growth of epithelial cells or connective tissue.

Problem: Ducts are improperly formed, leading to poor filtration of water, waste and salts.

Human Aorta - NormalSimple Squamous Epithelium – Provides smooth surface on interior of artery.

Lumen – inside of blood vessel

Basement membrane

Smooth Muscle Tissue

Connective Tissue

Artery - AtherosclerosisPlaque and cholesterol are stored under the SSE.

Problems: Narrows artery, leaves interior of artery rough and decrease elasticity of artery.