1. 30-1 The Chordates

2. Chordate Member of the phylum Chordata; animal that has, for at least some stages of its life, a dorsal hollow nerve cord, a notochord, pharyngeal pouches, and a muscular tail.

3. Notochord Long supporting rod that runs through a chordate’s body just below the nerve cord.

4. Pharyngeal pouch One of a pair of structures in the throat (pharynx) region of a chordate.

5. vertebra Individual segment of the backbone; encloses and protects the spinal cord

6. Key concept A chordate is an animal that has, for at least some stage of its life, a dorsal, hollow nerve cord; a notochord; pharyngeal pouches; and a tail that extends beyond the anus.

7. Key Concept The two groups of nonvertebrate chordates are tunicates and lancelets.