Phylum Chordata

Phylum Chordata is a group of animals that possess a notochord at some stage of their life, which is a flexible rod that provides support. Members of this phylum include vertebrates like mammals, birds, reptiles, amphibians, and fish, as well as some invertebrates like tunicates and lancelets. Chordates typically have a dorsal nerve cord, gill slits, and a post-anal tail during development. This diverse group is characterized by their complex body structures, advanced nervous systems, and varied habitats, ranging from oceans to deserts, illustrating the significant evolutionary adaptations within this phylum.