When Blastopore Forms Mouth?

The majority of coelomate invertebrates develop as protostomes ("first mouth") in which the oral end of the animal develops from the first developmental opening, the blastopore. In the deuterostomes ("second mouth": cf.

Does the blastopore become the mouth?

Blastopore becomes the mouth. The second opening will become the anus. ... The blastopore becomes the anus and the mouth develops as the second opening.

What is it called when the blastopore becomes the mouth?

Origin of Protostomia. ... Animals in which the blastopore becomes the mouth are called protostomes; those in which the mouth develops after the anus are called deuterostomes (from the Greek "deutero," meaning second, and "stoma," meaning mouth).