Across
- 2. tooth-like scales
- 4. bony plate covering the gill chamber
- 7. chordates born very immature and develop in a pouch on the ventral side of the mother
- 8. monkeys, lemurs, apes...
- 11. region dealing with chemical odours
- 14. jawless fishes
- 15. source of nutrients for embryo while in egg
- 17. organ that helps fish change depth by filling or letting out air
- 18. bats
- 20. controls basic survival functions (breathing, heartbeat...)
Down
- 1. skeletal chord of connective tissue running lengthwise along the dorsal surface
- 3. connects embryo to placenta
- 5. line of sensory cells along the side of a fish's body
- 6. class aves
- 9. trunked mammals
- 10. human foot
- 12. egg that provides a self-contained environment for the embryo
- 13. osteichthyes
- 16. flesh eaters
- 19. capable of grasping