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Home > All Images > 1992 > March > 18 Mar 1992

Images Dated 18th March 1992

Choose from 2 pictures in our Images Dated 18th March 1992 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


False-colour SEM of human seminiferous tubules Featured 18 Mar 1992 Print

False-colour SEM of human seminiferous tubules

False-colour scanning electron micrograph of seminiferous tubules in the human testis (cross section), the site of production and maturation of sperm. Round undifferentiated cells lining the tubule wall (blue, pink) become sperm by halving their chromosome number, and transforming in a process which takes about two months. During this time the cells move toward the centre of the tubule and develop tails. Mature sperm migrate up the cavity of the tubule & are stored in the epididymis. 200-300 million sperm are released in an average ejaculation. Magnification: x135 at 6x7cm size

© PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY LA SAPIENZA , ROME/SCIENCE PHOTO LIBRARY