This cross section through several mouse testes shows how sperm are made and maintained. The testes are where sperm cells are made. A human male can produce between 70 million and 150 million sperm ...

More information: Aviya Stopel et al, Towards a "Testis in a Dish": Generation of Mouse Testicular Organoids that Recapitulate Testis Structure and Expression Profiles, International Journal of ...