animal crossword

4. body plan of an animal can be divided along a line that separates the animal's body into right and left halves
6. the milk-producing gland of women or other female mammals.
7. having a disproportionate arrangement of parts
9. buoyancy organ possessed by most bony fish
14. an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
15. organ that connects the developing fetus to the uterine wall, thereby allowing nutrient uptake, waste elimination, and gas exchange via the mother's blood supply
16. an adaptation to lay eggs on land or retain the fertilized egg within the mother.
17. the arrangement of body parts around a central axis
18. bottem dweller
20. a rigid external covering for the body in some invertebrate animals

1. a network of water vessels in the body
2. flexible connective tissue found in various forms in the larynx and respiratory tract
3. an animal of a large group distinguished by the possession of a backbone or spinal column
5. asexual reproduction method in which a new organism develops from a bud of an existing organism
6. one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria
8. any animal whose regulation of body temperature depends on external sources,
10. shedding old skin hir ect
11. orginisim that is both male and female
12. an animal lacking a backbone
13. dependent on or capable of the internal generation of heat.
19. is a projecting mass of swollen and hypertrophied