Across
- 2. temporary organ that joins the mother and fetus, transferring oxygen and nutrients from the mother to the fetus
- 5. or casting off of an outer layer or covering and the formation of its replacement
- 7. animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface
- 10. Eggs- covered with a protective leathery shell
- 11. an animal lacking a backbone
- 16. that possess a vertebral column and/or notochord at any point in their lives
- 18. having a hollow cylindrical body closed and attached at one end
- 19. firmtissue but is softer and much more flexible than bone
- 20. Vascular System-a network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels
- 21. internal skeleton
Down
- 1. rigid or articulated envelope that supports and protects the soft tissues of certain animals.
- 3. on or capable of the internal generation of heat.
- 4. a form of asexual reproduction in which a new individual develops from some generative anatomical point of the parent organism.
- 6. of cnidarian in which the body is shaped like an umbrella
- 8. absence of or deviation from the regular disposition of similar parts of the body relative to a specific point, axis, or plane
- 9. community of organisms that live on, in, or near the seabed, river, lake, or stream bottom
- 12. condition of having both male and female reproductive organs
- 13. Symmetry-body can be divided along a plane that divides the animal into left and right sides
- 14. Symmetry-arrangement of body parts around a central axis, like rays on a sun or pieces in a pie
- 15. Glands-the milk-producing gland of women or other female mammals.
- 17. Bladder-contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking.