BO VEISLAND, MI&I / SCIENCE PHOTO LIBRARY BO VEISLAND, MI&I / SCIENCE PHOTO LIBRARY
Testis. Illustration of a section through a single human testis. The paired testes are the male sex organs. The testis (kidney-shaped at right) mostly consists of seminiferous tubules, one of which is unravelled at bottom right. The tubules are arranged in radiating testicular lobes. Sperm are manufactured in the tubules and then pass to the epididymis (thick red, at centre left). The epididymis consists of a single convoluted tube within which sperm mature and are stored. Mature sperm are transported up the vas deferens (thick tube at left) to the urethra at ejaculation. The thin tubes entering the testis at centre are arteries (red) and veins (blue), respectively.
Model release not required. Property release not required.