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.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.