1) Craniate 2) Vertebrate 
(from the article `circulation`) Although clearly related to its mode of life, the blood system of a species also reflects its evolutionary history. The most significant change that ... ...and these features were presumably present in fossil ancestors that lived more than 500,000,000 years ago. The evolution of the endocrine system ... ...
[n] - a vertebrate animal possessing true jaws
noun a vertebrate animal possessing true jaws