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प्रश्न
Describe the process of fertilisation in humans and development of embryo briefly.
उत्तर
In humans, fertilisation is internal. Sperms are introduced in the vagina by the penis during copulation. The sperms move up through the cervix, enter the uterus and pass into the oviducts. In the oviducts, the egg gets fertilised by one of the sperms. Zygote is formed by the fusion of a sperm and an egg. This zygote divides multiple times to form a hollow ball of the cells called embryo.
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