Animals CW Part 1

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Across
  1. 2. flat-edged teeth used to bite off and cut parts of food
  2. 4. protective coloration; a common animal defense
  3. 6. an animal whose body does not produce much internal heat (cold-blooded)
  4. 7. an organ that produces milk with which mammals feed their young
  5. 8. sharply pointed teeth that stab food and tear into it
  6. 10. an arthropod with only two body sections
  7. 11. an endothermic vertebrate with a four-chambered heart, skin covered with fur or hair, and has young fed with milk from the mother's body
  8. 12. an animal whose body controls and regulates its temperature by controlling the internal heat it produces (warm-blooded)
  9. 13. an arthropod that has two or three body sections, five or more pairs of legs, two pairs of antennae, and usually three pairs of appendages for chewing
  10. 16. an ectothermic vertebrate with lungs and scaly skin; lays eggs with tough, leathery shells
  11. 17. a mammal whose young are born alive at an early stage of development, and which usually continue to develop in a pouch on their mother's body
  12. 20. a radially symmetrical invertebrate that lives on the ocean floor and has a spiny internal skeleton
  13. 23. the animal phylum whose members have a notochord, a nerve cord, and slits in their throat at some point in their lives
  14. 24. teeth that, along with premolars, grind and shred food into tiny bits
  15. 25. an internal skeleton
Down
  1. 1. an appendage on the head of some animals that contains sense organs
  2. 3. the bones that make up the backbone of an animal (vertebrae)
  3. 4. a large feather that helps give shape to a bird's body
  4. 5. short, fluffy feather that traps heats and keeps a bird warm
  5. 9. a mammal that develops inside its mother's body until its body systems can function independently
  6. 14. a vertebrate that lives in water and has fins
  7. 15. an endothermic vertebrate that has feathers and a four-chambered heart, and lays eggs
  8. 18. an ectothermic vertebrate that spends its early life in water and its adulthood on land, returning to water to reproduce
  9. 19. a flexible rod that supports a chordate's back
  10. 21. an arthropod with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings
  11. 22. an outer skeleton