Question

Check Your Understanding crayfish specimen, what external differences did you note between the mate 4.1 After observing your and female? e was attached to the leg what 's the leg? What 4.2 During the dissection, when you removed a leg from your crayfish, what stru the function of this structure in the crayfish? 30 4.3 What structures are present in the circulatory system of the crayfish that would indicate an open circulat 44 Custaceans are different from the other arthropods because they have two pairs of anterior antennae. (Circle correct answer.) True/False

Answer 1

4.1

1.male crawfish generally has larger size than female crayfish

2.male crawfish carries extra sets of swimmerets. They are enlarged and hard structure.

3.female crawfish has small hole behind all swimmerets.

4.females are broader in shape.

4.2

When we dissect legs from crawfish, cheliped gets removed.

Function of cheliped is to defense and capture food.

4.3

Crawfish has open circulation. There heart is situated completely on dorsum side and they doesnt have veins. Only system of arteries are present.