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सही रीढ़ और जानवरों के एक होने के लिए पृष्‍ठदंड शामिल

The phylum of animals that is characterized by elongated bilaterally symmetrical bodies. In some phase of their life cycle, they have a notochord and gill slits or pouches. Chordates also often have a head, a tail, and a digestive system with an opening at both ends of the body. The Chordata include fish, amphibians, reptiles, birds, mammals, and 2 invertebrate subphyla (tunicates and lancelets).

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