Across
- 3. body system of glands
- 9. era with first multicellular life
- 10. away from the point of attachment
- 11. six legs, three body segents
- 12. 10 legs, 2 body segments, crabs and lobsters
- 13. arthropod with two pairs of legs per segment, harmless scavenger
- 18. era when mammals are dominate land animal
- 19. segmented worms
- 23. top or back side
- 24. arthropod with one pair of legs per segment, venomous predator
- 25. body system that filters blood
- 26. body system with brain and spinal cord
- 27. warm blooded, hair, milk
- 28. have foot, mantle, and radula, clams and snails
- 29. includes bony, jawless, and cartilaginous
- 30. warm blooded with feathers
Down
- 1. body system that breaks down food
- 2. bottom or belly side
- 4. body system that transports blood around the body
- 5. close to the point of attachment
- 6. vertebrate group where larvae are born in water then move to land through metamorphosis
- 7. phylum with stinging cells and tentacles, jellyfish
- 8. simplest animals
- 14. water vascular system, starfish sea urchins
- 15. scaly skin, cold blooded, amniotic eggs
- 16. nematodes
- 17. simple worms that can regenerate, planarians
- 19. jointed legs and appendages, exoskeleton
- 20. era with first vertebrates and life on land
- 21. eight legs, two body segments
- 22. era of dinosaurs