Pseudostratified columnar epithelium, computer illustration.

Pseudostratified columnar epithelium, computer illustration.

Simple columnar epithelium, computer illustration.

Simple columnar epithelium, computer illustration.

Stratified cuboidal epithelium, computer illustration.

Epithelial metaplasia, computer illustration. Metaplasia is a change of cell type in a region. This illustration shows squamous metaplasia of respiratory epithelium, a consequence of cigarette smoking.

Oral trichomonas and buccal epithelium, illustration

Lung cancer, composite image

Lung cancer, composite image

Lung cancer, composite image

Transitional epithelium, computer illustration. This type of epithelium is found in urinary bladder.

Computer illustration of the human digestive system and a close-up view of bacteria found in the intestines.

Columnar epithelium, illustration

Epithelium transitional, illustration

Epithelium transitional, illustration

Pseudostratified epithelium, illustration

Epithelium transitional, illustration

Pseudostratified epithelium, illustration

Columnar epithelium, illustration

Columnar epithelium, illustration

Columnar epithelium, illustration

Skin cancer, light micrograph

Columnar epithelium, illustration

Gingivitis, light micrograph

Human skin cells, artwork

Human skin cells, artwork

Conceptual image of stratified cuboidal epithelium.

Conceptual image of simple columnar epithelium.

Retina (Cross-Section) Unlabeled

Squamous Cell Carcinoma Unlabeled

Colon, light micrograph

Tonsil, light micrograph

Conceptual image of simple cuboidal epithelia.

Illustration of an atypical growth on the skin that could be a sign of skin cancer.

Squamous epithelium cells, illustration