What is the difference between the embryonic development of protostomes and deuterostomes?

Question

anonymous · Answer

The major difference between protostomes and deuterostomes are how they develop in the early embryo stages. In protostomes the mouth opening is the first to be formed later followed by the anus. In deuterostomes the anus forms first followed by the mouth. This all occurs in the gastrulation stage.

koikkara · Answer

Deuterosomes are a organisms that follow a particular pattern of embryonic development. (Radial cleavage, determinant, enterocoely, blastopore becomes anus) Chordata and echinodermata are deuterosomes.


Protostomes undergo spiral cleavage, indeterminant, schizocoely, and blastopore becomes mouth. Any organism (like arthropoda) that is not deuterostome must be protostome.