Animal Crossword

5. is an organ that develops in your uterus during pregnancy.
9. an organism that has complete or partial reproductive organs and produces gametes.
10. a solitary or colonial sedentary. form of a coelenterate such as a sea anemone.
11. shed old feathers, hair, or skin, or an old shell.
14. an organism in which internal physiological sources of heat are of relatively small or of quite negligible importance in controlling body temperature.
17. having or developing buds.
18. of, relating to, or occurring at the bottom of a body of water.
20. he milk-producing gland of women or other female mammals.
21. a network of water vessels in the body.

1. lack or absence of symmetry.
2. the property of being divisible into symmetrical halves.
3. an internal skeleton.
4. an animal of a large group distinguished by the possession of a backbone or spinal column.
6. dependent on or capable of the internal generation of heat.
7. symmetry around a central axis.
8. type of egg produced by reptiles, birds, and prototherian(mammals).
12. a free-swimming sexual form of a coelenterate such as a jellyfish.
13. a gas-filled sac present in the body of many bony fishes.
15. a tough but flexible tissue that is the main type of connective tissue in the body.
16. a rigid external covering for the body in some invertebrate animals.
19. an animal lacking a backbone.