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2.a) The body of the crayfish is divided into a serial repetition of parts. What is...

2.a) The body of the crayfish is divided into a serial repetition of parts. What is the term for this? There are two main regions of the body. What is the part made up of a fused head and thorax? What is the other region posterior to this?

2.b) How many pairs of antennae do crayfish have? Name them (use the study guide). What is their function?

2.c) What is the scientific name for the large pincers of the crayfish? What are they used for?

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2a. The serial repetition of the parts is termed as metamerism . The part is made up of a fused head and thorax is called as cephalothorax.The other region posterior to the cephalothorax is abdomen, six somites with telson.

2b. Cray fish have the two pairs of antennae. These are named as antennae and antennule. It functions in searching the suitable mate by their chemical release, touch receptors at antennae .

2c. The scientific name for the large pincers of the crayfish is chelipeds. They used it for holding the prey and to keep away the predators.

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