Findings

Ciliated pseudostratified columnar epithelium from the respiratory tract of a monkey. Note the epithelium consists of ciliated cells, interspersed goblet cells and basal cells that rest on a basal lamina overlying a loose connective tissue containing a capillary.

Comment

Although all cells in this epithelium make contact with the basal lamina, not all reach the lumen, hence the pseudostratified appearance.

Preparation

Plastic section; uranyl acetate and lead citrate

View

Medium-power transmission electron microscopy

Specimen

Respiratory tract

Image Credit

Carter Rowley
Micron BioSystems
Denver, CO 80222