Block14/Fig. 5, 93W7214, Epididymis, h&e

block14_11.jpg - Fig. 5, 93W7214, Epididymis, h&eThe duct of the epididymis is lined by pseudostratified columnar epithelium which contains two distinguishable cell types: tall columnar cells (T) and basal cells (B). The free surface of the cell possesses stereocilia (not shown here). These are extremely long and branching microvilli. They evidently adhere to each other during the preparation of the tissue to form the fine tapering structures (arrow) that are characteristically seen with the light microscope. The nuclei of the columnar cells are elongated and are located a moderate distance from the base of the cell. They are distinguished from the spherical nuclei of the basal cells that lie close to the basement membrane.Because of the unusual height of the columnar cells and the tortuosity of the duct, an uneven lumen appears in some sites. A thin layer of smooth muscle (S) circumscribes the duct. Beyond the smooth muscle coat, there is a small amount of connective tissue (CT) that binds the loops of the duct together and carries the blood vessels (BV) and nerves.

Fig. 5, 93W7214, Epididymis, h&e The duct of the epididymis is lined by pseudostratified columnar epithelium which contains two distinguishable cell types: tall columnar cells (T) and basal cells (B). The free surface of the cell possesses stereocilia (not shown here). These are extremely long and branching microvilli. They evidently adhere to each other during the preparation of the tissue to form the fine tapering structures (arrow) that are characteristically seen with the light microscope. The nuclei of the columnar cells are elongated and are located a moderate distance from the base of the cell. They are distinguished from the spherical nuclei of the basal cells that lie close to the basement membrane.
Because of the unusual height of the columnar cells and the tortuosity of the duct, an uneven lumen appears in some sites. A thin layer of smooth muscle (S) circumscribes the duct. Beyond the smooth muscle coat, there is a small amount of connective tissue (CT) that binds the loops of the duct together and carries the blood vessels (BV) and nerves.

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