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Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells Atlas of Microscopic Anatomy: Section 12 - Urinary System

Plate 12.244 Urethra

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger, Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed


URETHRA
Cavernous portion
penis

Plate 12.244 Urethra

Human, 10% formalin, H. & E., 162 x.

 

This plate shows the histology of the Cavernous portion of the male urethra. This portion of the urethra extends throughout the penis to open at the end of the glans. Note the stratified columnar epithelium mucosal lining intermixed with stratified squamous epithelium. The latter type of epithelium is found in interrupted areas throughout the extent of the urethra and is the only epithelial type found at the external opening of the urethra.

Note the deep recesses of the mucosal surface known as lacunae of Morgagni* Isolated intraepithelial mucous gland cells are seen interspersed between the stratified columnar cells lining the lacunae.

The lamina propria is made up of loose connective tissue rich in elastic fibers.

*Morgagni was an eighteenth-century Italian anatomist and pathologist.

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