Arthropods

Question 1

Abdomen

Answer 1

• The abdomen is the segmented tail area. The swimmerets, telson, and uropods are attached to the abdomen.

Question 2

Carapace

Answer 2

• The protective shell (exoskeleton) of the cephalothorax.

Question 3

Cephalic groove

Answer 3

• An indentation in the carapace between the head region and the thorax region.

Question 4

Cephalothorax

Answer 4

• The combined head and thorax (this animal has no neck!). The cephalothorax contains the heart, gills, and stomach.

Question 5

Swimmerets

Answer 5

• Five pairs of short appendages on the abdomen; they are used for swimming.
  Transfer sperm and hold eggs

Question 6

Tail fan

Answer 6

• The telson and the four uropods. It is used for backwards swimming.

Question 7

Telson

Answer 7

• The single, hind-most extension of the tail fan.

Question 8

Uropods

Answer 8

• Two pairs of appendages on the tail fan that surround the telson.

Question 9

Maxillipeds

Answer 9

• Crustacean appendages modified to function as mouthparts

Question 10

Cheliped

Answer 10

One of two big claws used for defense and food handling.

Question 11

Long antennae

Answer 11

• Two long, sensory organs towards the front of the crayfish lobster

Question 12

Antennules

Answer 12

• Two short sensory organs towards the front of the crayfish or lobster.

Question 13

Walking legs

Answer 13

• Four pairs of long, jointed legs used for walking. The gills are attached to the
  tops of the walking legs.

Question 14

Chitin

Answer 14

The substance that makes some arthropod skeletons hard

Question 15

Green Glands

Answer 15

Excretory organs (excrete nitrogen waste/osmoregulation) in crayfish