CRAW FISH DISECTION
Kristin Cuevas
11-21-13
3rd period
Aquatic Science

When weighed our craw fish weighed 22g.

   

                                                

When measuring the length of the crawfish it
came out to be 18 centimeters long.

When measuring the width of the lobster it
came out to be 3 centimeters long.

the legs (1) are called pereopod  Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail: The carapace(2)  is A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods such as crustaceansand arachnids, as well as vertebrates such as turtles and tortoises. In turtles and tortoises, the underside is called the plastron. the antenna (3) is one of a pair of appendages used for sensing in arthropods; also applied to cilium structures present in most cell types of eukaryotes. The claws(4) The correct term for the "claw" of an arthropod, such as a lobster or crab, is a chela (plural chelae). Legs bearing a chela are calledchelipeds. Chelae are also called pincers.. The plemere(5)  are the body segments of the cray fish .  The telson he telson is the posterior-most division of the body of an arthropod. It is not considered a true segment because it does not arise in the embryo from teloblast areas as do real segments. It never carries any appendages, but a forked "tail" called the caudal furca is often present.  The Uropod   are posterior appendages found on a wide variety of crustaceans. They typically have functions in locomotion.



This is the intestine with in the tail muscles.

This is a better view of the Midgut.