Crayfish+Dissection+Questions

//** Name(s) __Group__ Date Period_ **// //** Crayfish Dissection Worksheet **//

**1.** What structures are used for capturing prey and securing and eating food?

** 2. ** How are the antennae, chelipeds, other walking legs, and swimmerets related?

** 3. ** What are the main structures you could have observed when you removed the exoskeleton of the abdomen and tell the function of each?

** 4. ** Is the crayfish most vulnerable to its enemies from the dorsal or ventral side? Why?

** 5. ** The crayfish usually molts, or sheds its exoskeleton, twice a year. Why does the crayfish "hide" after it molts?

** 6. ** Name the appendages found on the head of a crayfish & tell the function of each. .

** 7. ** Of the systems studied, which two are most unlike the related human system? Why?

** 8. ** Although the crayfish has an inflexible cephalothorax, the crayfish is classified as a segmented animal. Why?

** 9. ** Name the appendages found on the thorax of the crayfish and tell the function of each. **10.** Name the appendages on the abdomen of the thorax and tell the function of each. **11.** Label the drawing of the crayfish.

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