Name: ______________________________________________________________ Period:___________
Crayfish Anatomy & Function
“How do crayfish move/protect themselves?”
Carapace ________ A. Organs which help crayfish visualize food and escape predators.
Walking legs ________ B. Large bumpy covering over the thorax used for protection.
Abdomen ________ C. Help the crayfish touch and taste.
Swimmerets ________ D. Broad flat plates which form a paddle to move crayfish backward quickly .
Eye ________ E. Appendages with small pinchers which allow crayfish to walk/move around.
Antenna ________ G. The muscular posterior end which propels the crayfish backward.
Uropod ________ H. Small appendages on abdomen which aid in the reproduction &
development of crayfish
“How do crayfish eat/digest?”
Cheliped ________ A. Sturdy jaws around the mouth used for chewing
Mandible ________ B. Second set of internal ‘teeth’ used to grind food in stomach
Mouth ________ C. Large claws used to catch and break apart food and fight other crayfish.
Stomach ________ D. Pumps body fluid around inside of crayfish to circulate oxygen and nutrients.
Gastric Mill ________ E. Large organ which stores and digests food.
Gills ________ F. Opening which allows crayfish to ingest food.
Heart ________ G. Organ which helps crayfish breathe.
“How do crayfish excrete their waste?”
Green gland ________ A. Long tube which absorbs nutrients from food passed from stomach.
Intestine ________ B. Small opening used to excrete solid waste.
Anus ________ C. Organ which produces bile (digestion) and filters out waste from body fluids.
Liver ________ D. Functions as a crayfish bladder/kidney used to excrete liquid waste.