Question

about the respiratory system of chordata, chondrichthye and Mammalia​

Answer 1

Answer:

Humans are pretty familiar with their own respiratory system. We know the basics about how we take in air for oxygen, and filter out carbon dioxide. Animals that breathe through their skin or use gills feel pretty foreign to us, but believe it or not, we're in the same group and have a lot of similarities!

The phylum chordata is a group of animals that have a dorsal hollow nerve tube (for us, our spine), a notochord (the nerves inside the spine), pharyngeal slits (which become gills, we only have these in the womb), and a post-anal tail (for us the tailbone, and in other animals an actual tail).