Mar 20, 2012
This explains why we all talk so much shit.
Teacher: We're part of the coelomates, which can be classified as protostomes or deuterostomes. When the zygote becomes a blastula (hollow ball of cells), they form an opening called the blastopore. In Protostomes, the blastopore becomes the mouth, the anus forms later; in deuterostomes, the anus, the mouth forms later.
Me: And what are we?
Teacher: Deuterostomes.