Chordata Definition & Meaning Merriam-Webster Medical

chordata  The Phylum Chordata is named for the stiffened rod that extends down the back, called a notochord Chordates have segmented external muscles, a an aorta below The meaning of CHORDATA is a phylum comprising animals having at least at some stage of development a more or less well-developed notochord,

An extensive vertebrate fossil record begins about 400 million years ago Embryological evidence places the phylum Chordata within the Invertebrate Zoology Kingdom: Animalia, Phylum: Chordata Phylum: Chordata Subphylum Urochordata —

Chordata , phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their Download format PHYLUM CHORDATA Introduction Task Resources Process Guidance Evaluation Conclusion Save slide Introduction ,