Animal Crossword Puzzle Creation

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Across
  1. 2. Eggs: are specialized, desiccation-resistant eggs produced by reptiles, birds, and monotreme mammals.
  2. 3. a free-swimming sexual form of a coelenterate such as a jellyfish.
  3. 7. Glands: the milk-producing gland of women or other female mammals.
  4. 8. an organism, such as a plant or invertebrate animal, that possesses both functional male and female reproductive organs.
  5. 10. an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
  6. 12. an animal of a large group distinguished by the possession of a backbone or spinal column.
  7. 13. an animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc.
  8. 14. a solitary or colonial sedentary form of a coelenterate such as a sea anemone.
  9. 17. Vascular System: (in an echinoderm) a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
  10. 19. (of an animal) dependent on or capable of the internal generation of heat.
  11. 20. firm, whitish, flexible connective found in various forms in the larynx and respiratory tract.
Down
  1. 1. Symmetry: the property of being divisible into symmetrical halves on either side of a unique plane.
  2. 2. lack of equality or equivalence between parts or aspects of something.
  3. 4. Bladder: a gas-filled internal organ found in most bony fish that acts as a buoyancy control device.
  4. 5. (of a plant) having or developing buds.
  5. 6. Symmetry: a type of balance where body parts or patterns are arranged regularly around a central axis.
  6. 9. a rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.
  7. 11. animals that rely on external environmental heat sources to regulate their body temperature.
  8. 15. a flattened circular organ in the uterus of pregnant eutherian mammals, nourishing and maintaining the fetus through the umbilical cord.
  9. 16. organisms, environments, or processes occurring at the lowest level of a body of water.
  10. 18. (of an animal) shed old feathers, hair, or skin, or an old shell, to make way for a new growth.