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Male Leach's sea star (Leiaster leachi) broadcast spawning, releasing streams of sperm from its arms. Kagoshima Prefecture, Kyushu, Japan
‾‾‾‾‾‾_/‾‾°Marco Bizziocchi
New LifeThoth Adan
__/‾‾_/‾‾_/‾‾_/‾‾__OMarco Bizziocchi
Picture No. 10873686Human sperm cells Date:
Picture No. 10874544Scanning Electron Micrograph (SEM): human sperm Date:
Model of an egg cell being fertilised by a sperm cell
Gender determination, computer artwork. Gender is determined by the sex chromosomes, X and Y. Females have 2 X chromosomes and men an X and a Y chromosome
Fertilisation, conceptual image
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