Coloured SEM of a seminiferous tubule

Coloured SEM of a seminiferous tubule

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Credit: PROFESSORS P.M. MOTTA, K.R. PORTER & P.M. ANDREWS/SCIENCE PHOTO LIBRARY

Caption: Testis. Coloured scanning electron micrograph showing a cross section of a seminiferous tubule within a testis. This is the site of production and maturation of sperm. The tubule is surrounded by a basal lamina (pale orange) which separates it from other seminiferous tubules. Round undifferentiated cells (blue-purple) line the tubule wall; they will halve their chromosome number and become mature spermatozoa (centre with tails) in a process which takes about two months. Mature sperm then migrate from the tubule to the epididymis where they are stored. Magnification: x590 at 6x7cm size.

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Keywords: anatomy, basal lamina, human body, male, reproduction, reproductive system, seminiferous, seminiferous tubule, sperm, testis

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