Table of Contents
- 1 What is the head of a crayfish called?
- 2 What is the Cheliped on a crayfish?
- 3 What is the upper surface back of a crayfish called?
- 4 What does the cephalothorax do in a crayfish?
- 5 Where is the brain located in a crayfish?
- 6 What is the exoskeletal plate on the crayfish called?
- 7 What do the mandibles of a crayfish do?
- 8 Which is the most calcified part of a crayfish?
- 9 Where are crayfish found in the United States?
What is the head of a crayfish called?
There is a tough armor that covers the vital organs and part of the head, this part of the exoskeleton is called the CARAPACE. Note how the carapace extends over the head and between the eyes, this structure is called the ROSTRUM.
What is the Cheliped on a crayfish?
The chelipeds are the large claws that the crayfish uses for defense and to capture prey. Each of the four remaining segments contains a pair of walking legs. In the abdomen, the first five segments each have a pair of swimmerets, which create water currents and function in reproduction.
What is the upper surface back of a crayfish called?
Covered dorsally (back/upper surface) by a series of shell plates called terga and ventrally (in front/belly) by the sterna. skeletal plates on the ventral side of abdomen are more transparent and flexible than dorsal plates but the ventral plates have a thickened posterior bar that provides support.
Where is the Maxillae on a crayfish?
Crayfish Appendage Table
| Appendage | Function | Location |
|---|---|---|
| Mandible or jaw | Crushes food | mouth |
| First Maxilla | Moves food to the mouth | behind the mandibles |
| second maxilla | moves water in the gill chamber | behind the mandibles |
| First maxilliped | Holds food; Senses touch and taste | at ventral and forward part of the thorax region |
What are the parts of a crayfish?
Crayfish have two body segments, the cephalothorax, which is the fused head and thorax, and the abdomen. The cephalothorax is protected by a carapace and is where you’ll find the eyes, antennae, and antennules. You’ll also find the mouth parts: mandibles, two pairs of maxillae, and the maxillipeds.
What does the cephalothorax do in a crayfish?
The cephalothorax It protects their vital organs of any crayfish (brain, heart, stomach, bladder, testicular, or ovarian). Note: If we look at the carapace from above, we can see the groove, that separates the head and chest regions. This separation is nominal because head-chest areas are basically ‘fused’ together.
Where is the brain located in a crayfish?
OF THE CRAYFISH. together constitute the brain’. From the brain there stretches backwards on the ventral aspect of the animal a ganglionated cord with one ganglion in each segment. The cord is enclosed in a tough sheath which forms the wall of a blood sinus within which the cord is suspended.
What is the exoskeletal plate on the crayfish called?
The part of the exoskeleton that covers the cephalo- thorax is called the carapace. A transverse cervical groove marks the head-thorax fusion line.
Where is the brain in a crayfish?
What does the head of a crayfish look like?
On the head, we find the eyes, antennae, and antennules, which look like much shorter antennae. A crayfish will use its antennae for touch, taste, and smell, and its antennules for balance, touch, and taste. We also find the mouth parts of the crayfish here.
What do the mandibles of a crayfish do?
A crayfish will use its antennae for touch, taste, and smell, and its antennules for balance, touch, and taste. We also find the mouth parts of the crayfish here. The mandibles are the crushing jaws, and two pairs of maxillae hold and tear solid food before it reaches the mouth.
Which is the most calcified part of a crayfish?
The carapace is the most calcified upper part of the crayfish body. It is thicker than the shell elsewhere on the crayfish. It connects to walking legs (pereiopods), maxillipeds, whiskers (antennae and antennule), and eyes of the shrimp.
Where are crayfish found in the United States?
North America. The greatest diversity of crayfish species is found in southeastern North America, with over 330 species in nine genera, all in the family Cambaridae. A further genus of astacid crayfish is found in the Pacific Northwest and the headwaters of some rivers east of the Continental Divide.