Light micrograph of a section of spermatic cord.

Light micrograph of a section of spermatic cord.

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Credit: ASTRID & HANNS-FRIEDER MICHLER/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a transverse section of human spermatic cord. The characteristically stellate central duct is lined with columnar epithelial cells with prominent purple nuclei, abutting a delicate basement membrane (pink line). Next to this is the inner layer of smooth muscle, with fibres lying longitudinal with respect to the duct. This appears as a dense pink annulus with purple nuclei within. Beyond, the middle layer of smooth muscle is arranged with its fibres lying in a circle around the duct. The outer smooth muscle layer, again longitudinal, can just be seen at each corner. Magnification x20 at 35mm size.

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Keywords: anatomy, human body, male, reproduction, reproductive system, spermatic cord

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