Digestive System
Break food apart.
This is the function of the gills.
Remove oxygen from the water for respiration.
Three functions of the chelipeds.
Defense, fighting, and capturing prey.
The main structure associated with the excretory system that we discussed in class.
Green glands.
Jointed appendages -- bend to move in specific directions and specialized for specific jobs
Exoskeleton--hardened cuticle, which is an outside layer of skin; it is nonliving tissue called chitin that does not grow with the body and must be removed for growth in a process called molting.
Body segmentation-specific regions
This is the structure of the mandibles.
Jaw-like structures that move side to side.
This is the structure of the gills.
Feather-like
Chelipeds are located at the _______end of the _______, just behind the ________. These large, jointed appendages function as primary claws or pincers
Chelipeds are located at the anterior end of the cephalothorax, just behind the maxillipeds.
Another name for the Green Glands.
Antennal glands.
These are small, paired, paddle-like appendages located on the ventral side of the first five abdominal segments of a crayfish.
Swimmerets.
The location of the mandibles is on the ________(underside) surface of the ______, directly in front of the ________.
on the ventral (underside) surface of the head, directly in front of the mouth
Increased surface area.
The structure of chelipeds: large _____(extending from thorax) that are _____(allowing for movement in many directions) serving as primary claws or ______
The structure of chelipeds: large appendages (extending from thorax) that are jointed (allowing for movement in many directions) serving as primary claws or pincers
Location of the green glands.
The base of the second antennae.
Describe how the abdomen moves the crayfish through the water.
Propels the crayfish in a backward direction by whipping the tail forward.
This are the functions of the stomach. (name 2)
Storage and digestion.
In two gill chambers under the carapace (the hard outer shell) on both sides of the thorax, directly above the base of the walking legs
This is how you know the gender of a crayfish is male.
Two sets of swimmerets near the thorax for breeding. They also have larger claws, and a narrower tail.
The structure of the antennal glands are __________ (bilateral symmetry) _______-colored excretory organs
are paired, green-colored excretory organs
The crayfish uses this law of motion when it uses it's tail to move through the water.
Third law.
The stomach of a crayfish is called the _________ and _________ stomach, it is located in the _______ (head) region of the ____________ just behind the _______and _________.
The stomach of a crayfish is called the cardiac and pyloric stomach, it is located in the anterior (head) region of the cephalothorax, just behind the rostrum and eyes.
When a crayfish is feeding, these act as a pump to fan water over the gills for respiration while feeding.
Maxillipeds (specifically the third pair)
This is how you know a crayfish is female.
Single, small, circular pore between tail and thorax. They also have wider tails to carry eggs, and smaller claws.
This is the function of the green glands: they filter metabolic waste--primarily ___________ --from the blood, and maintain ______________ by regulating water balance (one of the 6 characteristics of life) excreting diluted urine, and managing salt levels.
ammonia—from the blood. They maintain homeostasis
This is another name for the abdomen.
Tail.