Human spermatids. Transmission electron micrograph (TEM) of a section through a human testis (testicle), showing four elongating spermatids. Spermatid

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Human spermatids. Transmission electron micrograph (TEM) of a section through a human testis (testicle), showing four elongating spermatids. Spermatids mature into 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. A centriole is seen behind each head, from which the tail (flagellum) will grow. Magnification: x4,000 when printed 10 centimetres wide.

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Size: 4656px × 3770px
Photo credit: © MICROSCAPE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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