Spermatogonia, TEM

Spermatogonia, TEM

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Credit: MICROSCAPE/SCIENCE PHOTO LIBRARY

Caption: Spermatogonia. Transmission electron micrograph (TEM) of a section through the seminiferous tubule of a testis (testicle), showing two spermatogonia in the seminiferous epithelium (lining). Spermatogonia are one of the precursor cells that develop into spermatozoa (sperm cells). These two type B spermatogonia remain connected via an intercellular bridge created during a previous cell division. They will remain interconnected throughout further maturation and division until they have developed into mature spermatids. Mitosis of type A spermatogonia forms type B spermatogonia which in turn divide by mitosis to yield the earliest primary spermatocytes. Magnification; x4,000 when printed 10 centimetres tall.

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Keywords: biological, biology, black and white, black-and-white, cell, cell biology, cells, cytological, cytology, epithelial tissue, epithelium, germ cell, germ cells, histological, histology, incomplete cytokinesis, intercellular bridge, male, maturation, meiosis, monochrome, organelle, organelles, reproduction, reproductive system, section, sectioned, seminiferous tubule, sperm, spermatogenesis, spermatogonia, spermatozoa, spermiogenesis, stage, structure, tem, testicle, testicular, testis, tissue, transmission electron micrograph, transmission electron microscope, type b spermatogonium

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