THOMAS DEERINCK, NCMIR / SCIENCE PHOTO LIBRARY THOMAS DEERINCK, NCMIR / SCIENCE PHOTO LIBRARY
Tests. Confocal light micrograph of a section through a testis, the site of spermatogenesis (sperm production). Seen here are many seminiferous tubules, each encased in a connective tissue sheath (bright pink). Within each seminiferous tubule are spermatozoa (orange) and Sertoli cells (green), which nourish the developing sperm.
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