Stages of Animal Development: Cleavage, Gastrulation, Organogenesis

The video explains the development of animals, starting with their reproduction through sperm and egg fertilization, leading to the formation of a zygote. It covers the process of cleavage, blastula formation, and gastrulation, where germ layers become apparent. Diploblastic and triploblastic animals are discussed, highlighting their unique germ layers and body cavities. The video concludes with organogenesis, where cells differentiate into various organ systems.

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