Across
- 4. the strainer like opening to the water-vascular system.
- 9. a condition in which two equal halves of a body mirror each other
- 10. Layer of tissue that covers the body of many invertebrates.
- 12. Top half
- 15. An internal supporting skeleton
- 16. Hard, external, supporting structure that develops from the ectoderm
- 17. circulatory system Heart that circulates blood through that forms a closed loop
- 18. asexual reproduction in which a part of the parent organism pinches off
- 19. irregular in shape without symmetry
- 20. Body cavity that contains internal organs.
- 22. In arachnids the body part made up of the head and the thorax
- 23. A cavity that serves both digestive and circulatory purposes in cnidarians.
- 24. One organism feeds on and lives on or in another organism.
- 25. Consists of water that is contained under pressure in a closed cavity.
- 27. Mouth part in arthropods used to pierce and suck food.
Down
- 1. the front end
- 2. concentration of nerve tissue and sensory organs at the anterior of an organism
- 3. Organism that has both make and female reproductive organs.
- 5. A carbohydrate that forms part of the exoskeleton of arthropods and other organisms
- 6. In aquatic animals, a respiratory structure that consists of many blood vessels
- 7. a system of fluid filled, closed tubes that work together to enable echinoderms to move and get food
- 8. Tail like structure on the back of a euglena
- 11. Eye composed of many light detectors, separated by pigment cells.
- 13. Appendage that some invertebrates use to move
- 14. pincers that aid in catching food and in removing foreign materials from the skin
- 18. respiration air enters the lungs of a spider
- 21. Animal that does not have a backbone
- 26. Stinging cells located on tentacles