Invertebrates -Animals without Backbones
Vocabulary
1. mucus a sticky liquid substance
2. vertebrates animals with a backbone
3. invertebrates animals without a backbone
4. vertebrae the small bones that make up your spine or backbone
5. pore a small body opening or hole
6. stinging cells cells that contain a poisonous thread
7. tentacle an arm-like part on an animal
8. parasite a living thing that lives on or in another living thing
9. flatworm a worm with a flattened body and only one body opening
10. planarian a type of flatworm
11. tapeworm a type of flatworm that is a parasite
12. host an animals that supplies the food for a parasite
13. roundworm a worm that has a round body and two body openings
14. segmented worm a worm that has a body divided into segments
15. segments section
16. leech an example of a segmented worm that is a parasite
17. mollusks an invertebrate that has a soft body
18. mantle a fleshy covering that protects the organs of a mollusk
19. echinoderm a spiny-skinned invertebrate that lives in the ocean
20. tube foot a hollow structure with a sucker at the end
21. arthropod an animal with jointed legs, a segmented body, and a hard outer covering
22. exoskeleton the hard outer covering of all arthropods which protects the organs inside the animals body
23. molt to shed the outer body covering
24. antennas sense organs that help an arthropod locate food and other objects
25. crustacean an arthropod that usually has two body sections and two pairs of antennas
26. arachnids a group of arthropods with two body sections that do not have antennas
27. thorax the middle part of an insects body
28. abdomen the rear part of an insects body