About this document
Overview of Phylum Chordata by sehrish is a document available to read on EtoBox.
The document discusses the phylum Chordata, which includes about 45,000 species that inhabit both aquatic and terrestrial environments. The four key characteristics of chordates are the presence of a notochord, pharyngeal slits or pouches, a dorsal tubular nerve cord, and a postanal tail at some stage of development. Pharyngeal slits evolved for filter feeding in aquatic chordates but now also aid in respiration with the addition of gills. The nerve cord allows for complex sensory and motor functions and is
- Author
- sehrish
- Language
- EN