LM of sectioned whole human testis

LM of sectioned whole human testis

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Credit: MANFRED KAGE/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a section through a whole human testis, the site of production of male sperm & secretion of male sex hormones. The bulk of the testis consists of seminiferous tubules (gland-like, stained purple), where spermatogenesis occurs. The tubules are segregated into lobules by fine septa. Spermatozoa migrate from the tubules into the epididymis, a tightly coiled tube that forms a compact mass extending down the the entire length of the posterior testis (left side on image), forming polar caps at top & bottom. The epididymis stores newly-formed sperm until they pass into the vas deferens during ejaculation.

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Keywords: anatomy, human body, light micrograph, male, reproduction, reproductive system, testis

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