Invertebrates
Across
2. Parasitic flatworm that may live in more than one host
3. Jaws
4. Asymmetrical animal
9. Have a two-part hinged shell
13. Tubes in arthropods to remove nitrogen wastes
14. Mollusk with eight tentacles
17. Middle stage during incomplete metamorphosis
18. Glands in crayfish to remove nitrogen wastes
19. The ability of animals to break into pieces and regrow parts
24. Living attached to a surface or substrate
26. Number of legs on insects
27. Terrestrial crustacean that can roll into a ball
28. Flexible protein making up a sponge’s skeleton
30. Lives in the ocean or seas
32. Clams, oysters, snails, and squid
34. Have a single shell like snails
37. Number of legs on an arachnid
38. Sting cells in a jellyfish’s tentacles
40. Type of digestive tract in roundworms
42. Symmetry in which the organism has a right and left side that are mirror images
46. First body section of an arachnid or spider
51. Animals with a partially lined body cavity
52. Tough muscular tissue in mollusks that protects their body organs
53. Jellyfish have this cnidarian body form
54. Produced by squids to cloud water and escape predators
55. Appendages of arthropods
56. No pattern in the arrangement of body parts
Down
1. Producing both eggs and sperm
5. Top or back side of an organism
6. Vegetarian arthropod with 2 pairs of legs per body segment
7. Fangs
8. Shedding of the exoskeleton
10. Animals without a lined body cavity
11. Group of invertebrates with radial symmetry
12. Has three body layers and a flat shaped body
13. Jellylike material between the two cell layers in cnidarians
15. Produce silk in spiders
16. Metamorphosis from egg to larva to pupa to an adult
20. Body cavity in cnidarians
21. Large opening at the top of a sponge where excess water leaves
22. Also called calcium carbonate and makes up the case of corals
23. Predaceous arthropods with one per of legs per body segment and poison claws
25. Lives in water
29. Microscopic organisms used as food by filter feeders
31. Type of feeding in which food is strained from the water
33. Bristles on the underside of earthworms for movement
35. Front or underside of an animal
36. Flagellated cell that brings food and water into a sponge
39. Where parasitic animals live
41. Cells in flatworms to remove nitrogen wastes
43. Segmented worms
44. Fluid filled body cavity in earthworms that serves as their skeleton
45. Type of digestive tract in cnidarians
46. Pincers
47. Cnidarian with upright tentacles
48. Membrane on arthropods that detects sound
49. Having an anterior or head end where sensory organs are concentrated
50. System used by echinoderms to move, feed, and reproduce