animal crossword

2. any so-called cold-blooded animal
3. is a sexually reproducing organism that produces both male and female gametes.
4. one of the three Gorgons
5. a system of vessels in echinoderms containing a circulating watery fluid that is used especially for the movement of tentacles and tube feet
7. the property of being divisible into symmetrical halves on either side of a unique plane.
8. lack or absence of symmetry
9. firm, whitish, flexible connective tissue found in various forms in the larynx and respiratory tract, in structures such as the external ear, and in the articulating surfaces of joints. It is more widespread in the infant skeleton, being replaced by bone during growth.
13. a gas-filled organ in the dorsal coelomic cavity of fish
15. a projecting growth of tissue from a surface in the body, usually a mucous membrane
16. an organ that develops in the uterus during pregnancy
18. accompanied by the release of heat.
20. an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

1. an animal without a backbone
4. shed old feathers, hair, or skin, or an old shell, to make way for a new growth
6. an animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
10. related to the bag and liquid that surround the embryo
11. a hard covering that supports and protects the bodies of some types of animals
12. the milk-producing gland of women or other female mammals.
14. symmetry around a central axis, as in a starfish or a tulip flower.
17. a plant having or developing buds
19. anything associated with or occurring on the bottom of a body of water