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Hello everyone, in this video we will be discussing about the correct order or the sequential order of the early animal development.
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So before getting into the options, first let us know the stages of fertilization.
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So i'm going to like not get much into detail, but i'm going to cover something brief such that we will be able to answer the question at the end of the video.
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Right? so when a fertilization happens, that is when a sperm and an egg fuses together.
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When a two haploid cells fuses together, the resulting diploid cell is called the zygote.
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This zygote thus formed would divide continuously and then turn into a blastocyst, which is a microscopic ball of cells, right? so this blastocyst would then embark on its journey to become the embryo.
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So this zygote will then is then converted to blastocyst in the fallopian cube itself.
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And the blastocyst formation would take up to six to seven days after fertilization, right? and after the blastocyst is formed, it reaches out of the filopian cube and sticks to the lining of uterus.
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Where it would again go under a great division in which the cell would divide into two parts completely.
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So the one part would become an embryo and the other part would become the placenta through which the nutrients are passed.
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So that's after the blastosis reaches the uterus, we find the formation of embryo, right? so once the blastosis sticks itself to the lining of uterus.
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Is embryo is being formed.
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At the end of 8th week, all the divided cells or the cell division and all is complete now.
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So it's in the stage where the embryo would now turn into a fetus where the divided cells would grow and develop...