Animal Crossword

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Across
  1. 2. the freely-swimming, umbrella- or disk-shaped gelatinous form of Cnidarians
  2. 4. a skeleton that is on the inside of a body
  3. 5. supporting connective tissue that is found throughout the body
  4. 6. shedding
  5. 8. the bottom of a body of water
  6. 9. warm-blooded animals
  7. 12. is located in the body cavity and is derived from an out pocketing of the digestive tube
  8. 14. Glands glands that in female mammals are modified to secrete milk
  9. 16. the hollow, columnar, sessile form of Cnidarians
  10. 18. cold-blooded animals
  11. 19. hard covering that supports and protects the bodies of some types of animals
  12. 20. vessels in echinoderms containing a watery fluid that is used especially for the movement of tentacles and tube feet
  13. 21. equal symmetrical body
Down
  1. 1. eggs that are encased by extra-embryonic membranes
  2. 3. an organ that connects the developing fetus to the uterine wall
  3. 7. an animal without a backbone
  4. 10. similar parts are arranged in a balanced way around the center of the body
  5. 11. having both male and female reproductive organs
  6. 13. disproportionate arrangement of parts
  7. 15. an asexual reproduction method in which a new organism develops from a bud of an existing organism
  8. 17. an animal with a backbone