Across
- 2. the organ posterior to the crop in earthworm to grind food
- 6. cnidarian body form that is umbrella-shaped w/ tentacles
- 8. innermost primary germ layer in an animal embryo
- 10. hard covering on the outside of some animals
- 14. a muscular blood vessel from the dorsal and ventral parts of an animals body
- 16. an opening in a sponge where water exists
- 18. method in which food particles are filtered from the water as it passes by or through some part of the organism
- 20. the divison of the body of an organism into a series of similar parts
- 21. internal network of fluid filled canals involved in feeding, respiration, internal transport, elimination of wastes, and movement in enchinoderms
- 24. system where blood moves thru vessels into open spaces around organs
- 28. rhythmic muscular contractions that move food through digestive system
- 29. an animal that can produce both egg and sperm
- 32. any of the flagellate cells that line the cavities of a sponge
- 33. back end of bilateral symmetrical organism
- 34. in insects, a series of chemically-controlled changes in body structure from juvenile to adult
- 35. a body cavity that is completely lined by mesoderm and that contains internal organs
- 36. arrangement of body structures
- 37. the periodic shedding of an old exoskeleton
Down
- 1. animal with a backbone
- 3. sphere shaped collection of amebocytes surrounded by spricules which can grow into a new sponge
- 4. small cluster of nerve cells
- 5. stinging structure on tentacles of cnidarians that is used to paralyze or kill prey
- 7. system in which blood moves through the body entirely enclosed in vessels
- 9. a rasping, tonguelike organ that is covered with chitinuos teeth and that is used for feeding by many mollusks
- 11. organism that is permanently attached to a surface
- 12. organism that survives by living and feeding either inside or attached to outer surfaces of another organism doing harm to the host
- 13. gathering of sense organs/nerve organs into the head region
- 15. animal without a backbone
- 17. 5 symmetrical parts
- 19. any structure, such as a leg or antenna, that grows out of an animals body
- 22. arrangement of body parts of an organism that they repeat around an imaginary line drawn through the centre of the organism
- 23. immature stage of organism that is unlike adult form in appearance
- 25. a free-swimming, cilliated larva of many worms and some mollusks
- 26. internal skeleton
- 27. resting stage of metamorphosis in which tissues of insect are organized in adult form
- 30. an independent and immature form of an organism that is morphologically different from the adult
- 31. cnidarian body form that is tube-shaped w/ mouth surrounded by tentacles
- 35. food storing organ in an earthworm
- 37. thin delicate layer of tissue that covers most of a mollusks body and secretes the shell when one is present