What is an animal from jdrinks

Animal behavior and social relationships from jdrinks

Simple invertebrates from jdrinks

Mollusks & annelid worms from jdrinks

Arthropods & echinoderms from jdrinks

"Animal Variety’s The Spice of Life"

Vocabulary:

invertebrate: animals that don’t have backbones

2. ganglion: mass of nerve cells

3. gut: digestive tract

4. coelom: body cavity that contains the internal organs

5. open circulatory system: circulatory system in which the fluid is not contained entirely within vessels

6. closed circulatory system: circulatory system in which a heart circulates blood through vessels in a closed loop

7. segment: identical or almost identical repeating body part

8. exoskeleton: hard external supporting structure

9. compound eye: an eye composed of many light detectors

10. antenna: a feeler that senses touch, taste, or smell

11. metamorphosis: phase in life cycle of many animals during which a rapid change from immature to adult form takes place

12. endoskeleton: an internal skeleton made of bone or cartilage

13. water vascular system: system of canals filled with watery fluid that circulates through an echinoderm’s body

14. bilateral symmetry: type of symmetry where two sides of the body mirror each other

15. radial symmetry: type of symmetry where the body is organized around the center like spokes on a wheel

16. asymmetry: having no symmetry

17. cnidarians: invertebrate group that has stinging cells

18. flatworms: invertebrate group that includes the simplest of worms, such as planarians

19. mollusks: invertebrate group with soft bodies, such as octopus and snails

20. annelid worms: invertebrate group often called the “segmented worms”

21. arthropods: invertebrate group whose name means “jointed limb”

22. echinoderms: invertebrate group with a spiny internal skeleton, such as sea stars

23. mandibles: mouthparts of an arthropod that can pierce and chew food

24. cephalothorax: body part made of both head and thorax in an arachnid

25. nerve ring: circle of nerve fibers in an echinoderm

26. collar cells: special cells in sponges that filter and digest food from the water

27. radula: organ in a mollusk used to scrape food

28. mantle: layer of tissue in a mollusk that protects the body

29. visceral mass: gills, guts, and other organs in a mollusk

30. shell: part of the mollusk body that protects it from predators and keeps it from drying out