Axial skeleton and ribs characterize this group of animals which evolved in the late Cambrian period out of need to maintain internal salt concentrations.
Axial skeleton and ribs characterize this group of animals which evolved in the late Cambrian period out of need to maintain internal salt concentrations. Instead of functioning in gas exchange and locomotion, its coelom supports internal organs and maintains the circulation system. Neural crest cells migrate from the dorsal neural plate of its embryos, giving rise to skin pigments, nerves of the peripheral nervous system, and bones of the cranium. Increased cephalization and a jointed dorsal nerve column evolved in – for ten points– what subphylum of chordates, our very own.
Axial skeleton and ribs characterize this group of animals which evolved in the late Cambrian period out of need to maintain internal salt concentrations.
Vertebrata; or vertebrate; prompt on “chordate”