Branchiomery

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

Branchiomery is the segmentation that develops in the embryo from the intestine - namely the formation of the gill arches . In all vertebrates , which are deuterostomians , the intestine comes close to the future mouth region, where it merges with the ectoderm , creating the mouth and possibly gill openings.

The gill systems that form consist of intestinal tissue. The segmentation is particularly noticeable in sharks, as they have several permanent gill openings that are located one behind the other.