Table of Contents
Which side is the crayfish more vulnerable from predators?
The crayfish is most vulnerable to its enemies from the ventral side because it is not protected by an exoskeleton. 5. The crayfish usually molts, or sheds its exoskeleton, twice a year.
What is the ventral side of a crayfish?
Term used to describe a female crayfish carrying eggs or a brood of young attached to her abdomen (ventral). The third segment from the base of segmented legs; ischia of certain walking legs may contain hooks in reproductively active males.
Where is the dorsal on a crayfish?
2. Place the crayfish so that the dorsal side is facing upward. Use the diagrams above to locate the rostrum. Beneath the rostrum are the two eyes, each of which is located on the end of a stalk….
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Class | Malacostraca |
| Order | Decapoda |
| Family | Cambaridae |
Which part of the crayfish is solidified for protection against predators?
The gills of the crawfish are located under the carapice, part of the exoskeleton. This adaption keeps very sensitive and vulnerable area of the gills protected at all times from predators and potential injury.
What systems do crayfish have?
Basically, crayfish internal anatomy includes the following systems: the circulatory system, the respiratory system, the digestive system, the nervous system, and the reproductive system. The majority of the internal organs are located in the Cephalothorax of the crayfish (the so-called head-chest area).
Why is a crayfish considered segmented?
Although the crayfish had an inflexible cephalothorax, it is classified as a segmented animal because it abdomen and tail is segmented and the cephalothorax is segmented underneath. The major function of the exoskeleton of a crayfish is to protect its soft body.
What two parts are usually combined in crayfish?
Crayfish have two body segments, the cephalothorax, which is the fused head and thorax, and the abdomen.
What does the ventral nerve cord do in a crayfish?
The ventral nerve cord of crayfish contains axons of five pairs of excitatory interneurons, each of which can activate the swimmeret system. Perfusion of the ventral nerve cord with the neuropeptide proctolin also activates the swimmeret system.
Do crayfish have a dorsal heart or ventral heart?
Crayfish have – a dorsal heart and ventral nerve cord, a ventral heart and dorsal nerve cord, an exoskeleton, an endoskeleton. a segmented body, cerebral ganglia and a ventral nerve cord, cephalization, bilateral symmetry.
Is crayfish an exoskeleton?
Crayfish are invertebrates. That means they don’t have bones, but they do have an exoskeleton to protect their inner body parts. The crayfish have jointed legs to walk and pick up food.