Across
- 4. cellular portion of arachnid GI tract, secretion/absorption
- 6. chelicerate tagmata, brain, chelicerae, pedipalps...
- 7. one-way valves that return hemolymph to the heart
- 11. first part of arachnid GI tract, invagination of cuticle
- 13. excretory gland of the arachnid prosoma
- 16. extinct arthropod animal, biramous appendages, 600-345mya
- 17. araneae organs that dispense silky webbing
- 18. blastocoel derived cavity of arthropod open circulatory system
- 19. mandibulate clade with the most legs
- 20. hexapoda + crustacea = this clade
- 22. deepest living layer of the arthropod exoskeleton
- 24. panarthropoda but not arthropoda, water bears
- 27. lipoprotein outer layer of the arthropod exoskeleton
- 28. head, thorax, abdomen are arthropod examples
- 29. chitin middle layer of the arthropod exoskeleton
- 30. all eight-legged chelicerates, formerly a class
Down
- 1. arthropod subphyla with jaw-like mouthparts
- 2. arthropod subphyla with pincer-like mouthparts
- 3. chelicerate tagmata, digestive/respiratory/reproductive organs
- 5. sperm packet, male spiders transfer this with pedipalps
- 8. opening of the arachnid tracheal system
- 9. eight-legged chelicerate order, fang-like chelicerae
- 10. horseshow crab is all that remains of this clade
- 12. harvestmen
- 14. last part of arachnid GI tract, water reabsorption
- 15. excretory tubule glands of the arachnid opisthosoma
- 18. arachnid "blood"
- 21. phylum with exoskeleton and jointed appendages
- 23. sensory projections of the arthropod exoskeleton
- 25. arachnid order of ticks and mites
- 26. panarthropoda but not arthropoda, velvet worms