1 min readOct 2, 2021
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Which came first? Mouth or Anus? 😅
It ain’t a joke!
Humans are complex animals and complex animals are classified based on their embryo development. There are two kinds of classifications: Protostome and Deuterostome. During embryo development the first opening is called the blastopore. What this blastopore becomes into decides whether the animal is a protostome or deuterostome.