| 释义 |
脊椎动物jǐzhuī dòngwù有脊椎骨的动物,是脊索动物的一个亚门。这一类动物一般体形左右对称,全身分为头、躯干、尾三个部分,躯干又被横膈膜分成胸部和腹部,有比较完善的感觉器官、运动器官和高度分化的神经系统。包括鱼类、两栖动物、爬行动物、鸟类和哺乳动物等五大类。{vertebrate; animal with vertebra, a subphylum of the chordate. The bodily form of a vertebrate is generally symmetrical and is divided into the head, the trunk and the tail (limbs), and the trunk is also divided into the chest and the abdomen by the diaphragm. It has fairly complete sense organs, locomotive organs and a nervous system with high differentiation. It includes fishes, amphibious animals, reptiles, birds and mammals.} |