What are the stages of embryonic development of chordates?

Let’s consider everything on the example of a person, since we belong to the type of chordates. Our development is very similar to that of many other chordates. It all starts with the formation of a zygote. She begins to actively share. After a while, the embryo is formed. At first, it is no larger than a match head. Then it starts to develop. The circulatory system, nervous system and others are being formed. Also, at the stage of embryonic development, we lose the notochord. We have a tail and gills at this stage, which also disappear before the onset of the second trimester of intrauterine development.

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