Human spermatids, TEM

Human spermatids, TEM

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Caption: Human spermatids. Transmission electron micrograph (TEM) of a section through a human testis (testicle), showing two elongating spermatids. Here, the spermatid germ cells are undergoing spermiogenesis - the final stage of spermatogenesis, which sees the maturation of spermatids into mature, motile spermatozoa (sperm cells). The wedge-shaped nuclei (black) contain the DNA/chromatin condensed and clustered as it is compacted into the emerging shape of the sperm head. Magnification: x15,000, when printed 10 centimetres wide.

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Keywords: acrosome, acrosomes, biological, biology, black and white, black-and-white, cell, cell biology, cells, chromatin, cytological, cytology, duo, germ cell, head, heads, histological, histology, male, maturation, monochrome, organelle, organelles, pair, reproduction, reproductive system, section, sectioned, sperm, spermatid, spermatids, spermatogenesis, spermatozoa, spermiogenesis, stage, structure, tem, testicle, testicular, testis, tissue, transmission electron micrograph, transmission electron microscope, two

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