WORKSHOP IN HISTOLOGY, CYTOLOGY AND EMBRYOLOGY - 2016

Chapter 5. SPECIAL HISTOLOGY

Urinary Organs

Slide 120. Ureter.

Staining: hematoxylin and eosin.

Magnification: x80.

The slide shows a cross-section of a small animal's Ureter. Under low magnification, note the stellate shape of its lumen (1) and examine the layers of its wall: the mucosa, submucosa, muscular layer, and adventitia.

The inner mucosal layer forms high folds and is lined with transitional epithelium (urothelium) (2). The basal layer of this epithelium consists of small Cells with oval and round nuclei. The intermediate layer contains four to five rows of larger cells. The superficial layer is formed by the largest cells, the superficial urothelial cells. The lamina propria of the mucosa (3) is composed of loose Connective Tissue. The muscularis mucosae is absent. The submucosa is thin (4).

The muscular layer consists of three layers of smooth myocytes: an inner longitudinal layer (5), a middle circular layer (6), and an outer longitudinal layer (7).

The adventitial layer (8) is represented by loose connective tissue and contains Blood Vessels and nerves.

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Slide 120. Ureter.



Last update: 07/08/2026

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