The Reproduction Process of a Human Being in Action - 搜索视频

Biology lesson: When a human sperm cell fertilizes a human egg cell, a substantial change occurs and a new human being is created. This human will continue to grow through different stages of development, but he or she will always be the exact same person as at the moment of fertilization. | Live Action

Biology lesson: When a human sperm cell fertilizes a human egg cell, a substantial change occurs and a new human being is created. This human will continue to grow through different

Live Action. Live Action · Original audio. Biology lesson: When a human sperm cell fertilizes a human egg cell, a substantial change occurs and a new human being is created. This human will continue to grow through different stages of development, but he or she will always be the exact same person as at the moment of fertilization.

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