Human spermatid, TEM

Human spermatid, TEM

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Credit: MICROSCAPE/SCIENCE PHOTO LIBRARY

Caption: Human spermatid. Transmission electron micrograph (TEM) of a section through a human testis (testicle), showing a single round spermatid. Spermatids mature into spermatozoa (sperm cells). One pole of the nucleus is covered with the developing acrosome, a cap-like membranous organelle, within which are enzymes required for penetration of the egg during fertilization. Round spermatids transform by the process of spermiogenesis into elongated spermatids by condensation/reshaping of the nucleus (dark, centre), loss of most cytoplasm and development of a tail/flagellum. Magnification: x6,000, when printed 10 centimetres wide.

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Keywords: acrosome, biological, biology, black and white, black-and-white, cell, cell biology, cells, cytological, cytology, developing, germ cell, histological, histology, male, maturation, monochrome, nuclear envelope, nuclear membrane, nucleolus, nucleus, one, organelle, organelles, reproduction, reproductive system, round, section, sectioned, single, sperm, spermatid, spermatogenesis, spermatozoa, spermiogenesis, stage, structure, tem, testicle, testicular, testis, tissue, transmission electron micrograph, transmission electron microscope

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