KhORDADORHO (Chordata), yak tipi hayvonoti darandai oliro guyand. Ba 3 zertip (pardadorho, bedumdumaho va muhradoron) judo meshavand.
Xordadorho khorda, naychai asabi pusht, tarkishi galsama dorand. Qarib dar rafti hayoti hamai Xordadorho naychai asabi pusht boqi memonad. Badani Xordadorho bugumdor buda, makhsusan dar davrai inkishofi janini bedumdumaho va muhradoron nagz ayon ast.