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Crayfish

Crayfish . CRAYFISH. Body: Two segments: Cephalothorax: Fused head and thorax 13 segments covered by a hard carapace Abdomen: 7 segments Mandibles: jaws for chewing (crush food) Maxillae: holds food and passes it to the mandibles and the mouth (tear food)

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Crayfish

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  1. Crayfish

  2. CRAYFISH • Body: • Two segments: • Cephalothorax: • Fused head and thorax • 13 segments covered by a hard carapace • Abdomen: • 7 segments • Mandibles: jaws for chewing (crush food) • Maxillae: holds food and passes it to the mandibles and the mouth (tear food) • Maxillipeds: sense organs which also help pass food to the mouth • Chelipeds: large, pincer appendages for food getting and protection • Antennae: segmented sense organs on the head (touch/taste) • Antennule: segmented sense organ (touch/taste/equilibrium) • Walking legs: four pairs • Swimmerets: aid in swimming and holding fertilized eggs in the female • Blood returns to the heart through a slit (osita) • Green gland: nitrogenous waste excretion (located in the head) • Senses: compound eye /balance organ • Reproduction: sexual (distinct sexes) • Respiration: gills

  3. Abdomen

  4. Antennae

  5. Antennule

  6. Carapace

  7. Cephalothorax

  8. Cheliped

  9. Digestive Gland (Dorsal)

  10. Digestive Gland (Lateral)

  11. Eggs

  12. Esophagus

  13. External View (Dorsal)

  14. External View (Ventral)

  15. Eye

  16. Female

  17. Male

  18. Ganglion Anterior

  19. Ganglion Posterior

  20. Gill

  21. Gonad

  22. Green Gland

  23. Heart

  24. Intestine

  25. Mandible

  26. Maxilla

  27. Maxillaped

  28. Muscle

  29. Stomach

  30. Swimmeret

  31. Telson

  32. Uropod

  33. Ventral Nerve Cord

  34. Ventral Nerve Chord Posterior

  35. Walking Leg

  36. MOLTING

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