👉 Excystation, also known as gastrulation, is a process that occurs during embryonic development of multicellular organisms. It's where the cell becomes a complete organism, taking over all its functions and structures. In this process, the egg cells divide into two identical daughter cells, which then fuse together to form a new embryo. This fusion involves the release of an extra cell wall, which allows the embryo to grow and develop. The term "excystation" comes from the Greek word
