What is a telson definition?
Definition of telson : the terminal segment of the body of an arthropod or segmented worm especially : that of a crustacean forming the middle lobe of the tail.
What is telson used for?
Together with the uropods, the telson forms the tail fan of lobsters, shrimp and other decapods. These are used as a paddle in the caridoid escape reaction, whereby an alarmed animal rapidly flexes its tail, causing it to dart backwards. Krill can reach speeds of over 60 cm per second by this means.
What is the function of the telson in a crayfish?
Crayfish Appendage Table
| Appendage | Function | Location |
|---|---|---|
| Swimmeret | 1st swimmeret in males transfers sperm to female; females use the 2nd-5th swimmerets to hold eggs & young; locomotion | abdominal region on the ventral side |
| uropod | swimming | posterior or tail end |
| telson | swimming | posterior or tail end |
What is the function of telson posterior?
Crustaceans. In lobsters, shrimp and other decapods, the telson, along with the uropods forms the tail fan. This is used as a paddle in the caridoid escape reaction (“lobstering”), whereby an alarmed animal rapidly flexes its tail, causing it to dart backwards.
What is Uropod and telson?
A paired biramous appendage attached to the sixth abdominal somite in all but the true crabs and usually combining with the telson to form a tail fan. [ An appendage of the last (6th) abdominal segment. [
What is the function of Cephalothorax?
The cephalothorax or prosoma is the anterior most of the two body parts of arachnids (the other part being the abdomen or opisthosoma). The cephalothorax features the eyes, mouth and legs of the arachnid. The cephalothorax is more rigid than the abdomen and contains the muscles used to operate the limbs.
What is the purpose of the telson and Uropod?
In the middle of the uropods is a structure called the telson, which bears the anus. The uropod and telson together make up the tail fan. The crayfish moves backward by forcing water forward with its tail fan.
What organism has a telson?
The third section, the horseshoe crab’s tail, is called the telson. It’s long and pointed, and although it looks intimidating, it is not dangerous, poisonous, or used to sting. Horseshoe crabs use the telson to flip themselves over if they happen to be pushed on their backs.
How do pleopods work?
Abstract. Amphipods, like most swimming crustaceans, employ a drag-based mechanism to produce thrust. The propulsors are paddle-shaped pleopods that move parallel to the direction of motion. These paired abdominal limbs generate both the propulsive thrust and the respiratory currents that bathe the thoracic gills.