Semen is a viscous, whitish fluid that is ejaculated from the penis during sexual activity. It contains spermatozoa, which are the reproductive cells responsible for fertilizing an egg, along with various enzymes, proteins, and nutrients to support and protect the sperm on their journey through the female reproductive system. Semen plays a crucial role in human reproduction and the continuation of the species.

英語での「semen」の定義と意味

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