Kingdom Animalia. Phylum Chordata “Vertebrates”. Organisms in this phylum are segmented animals with four distinctive features Dorsal hollow nerve cord Stiff notochord Pharyngeal slits behind the mouth Muscular post-anal tail Coelom Bilateral symmetry. Phylum Chordata “Vertebrates.
Organisms in this phylum are segmented animals with four distinctive features
DORSAL, HOLLOWNERVE CORD
SkullVertebratesA skull and a backbone are hallmarks of vertebrates
Air-breathing lungfishes that developed skeleton-reinforced appendages probably gave rise to the first amphibians.
Typical tetrapod limb skeleton
A traditional phylogenetic tree is based on patterns of embryonic development and some fundamental structures.Phylogeny of the Animal Kingdom
PROTOSTOMESCoelom fromcell masses
DEUTEROSTOMESCoelom fromdigestive tube
No body cavity
No true tissues