Mammals

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Across
  1. 1. Animals that regulate internal temperature
  2. 4. Protein that makes up mammal hair
  3. 6. Type of circulation involving lungs
  4. 7. Teeth used for grinding food
  5. 8. Covering found on all mammals
  6. 10. Animals that eat both plants and meat
  7. 13. Animals that give birth to live young
  8. 15. Group of egg-laying mammals
  9. 16. Sharp teeth used for stabbing
  10. 17. Air sacs in lungs for gas exchange
  11. 18. Organ that pumps blood through the body
  12. 19. Type of mammals with pouches
Down
  1. 2. Fluid mothers produce for offspring
  2. 3. Musclethat helps with breathing
  3. 5. Warm-blooded animals that maintain body temperature
  4. 9. Animals that eat insects
  5. 11. Teeth used for cutting and biting
  6. 12. Organ that nourishes unborn young
  7. 14. Organ system used for breathing
  8. 15. Egg-laying mammals (another term)