What are the appendages of shrimp?
What are the appendages of shrimp?
The appendages each consist of a basal protoiodide, a lateral exopodite, and a medial endopodite. Variations on this basic structure have allowed the shrimp to adapt different appendages for specific purposes such as propulsion, manipulation, and mastication. The cuticle consists of four layers covering an epidermis.
What are the features of a prawn?
Shrimp have a head (thorax) and a tail, and an abdomen with six segments (Figures 8 and 9). The last abdominal segment is the telson. The thorax has a spine called the rostrum, one pair of eyes, two pairs of antennae, three pairs of maxillipeds for feeding and five pairs of walking legs.
How many segments are there in prawn?
It is formed by union of head (5 segments) and thorax (8 segment). but compressed laterally and jointed. External segmentation is clearly marked and composed of 6 segment having a terminal conical piece, telson. The entire body and the appendages are covered by a hard and chitinous cuticle which forms exoskeleton.
What is the structure of a prawn?
Prawn respires in the aquatic medium and it carries three sets of organs for the purpose—lining of the branchiostegite, epipodites and gills. All these organs are enclosed within a special chamber on each side of the cephalothorax, which is called gill-chamber.
How many appendages are in prawns?
The prawn carries, in all, nineteen pairs of appendages of which the first five are cephalic, the following eight are thoracic, and the remaining six are abdominal. Each of the first two segments bears a pair of prehensile antennae or feelers. The first antenna or antennule lies behind the eye.
How many pairs of appendages are in prawns?
v The base of protopodite is composed of turo segments, a proximal coxa for a Hachment with the body and a distal basis which bears the two ramil, an outer exobodite and inner endopodite, bot comprising several Segments or Podomeses. v Prawn body contains nine teen pairs of appendages.
Is prawn an Arthropoda?
Prawn: The prawn belongs to the phylum Arthropoda and class Crustacea.
Is Prawn an Arthropoda?
What is the order of prawn?
Decapods
Prawns/Order
How do prawns move?
They swim forward by paddling with swimmerets on the underside of their abdomens, although their escape response is typically repeated flicks with the tail driving them backwards very quickly.
Is a leg an appendage?
Your arm is an appendage to your body. Appendage often describes body parts, either on humans or animals. If it’s something that sticks out — like a finger, tail, or leg — chances are it can be called an appendage.
How many thoracic appendages are in prawns?
Typically there is one pair of appendages in each segment of the body. The prawn carries, in all, nineteen pairs of appendages of which the first five are cephalic, the following eight are thoracic, and the remaining six are abdominal. Each of the first two segments bears a pair of prehensile antennae or feelers.
Where is the statocyst located on a prawn?
The statocyst is a small cuticular sac which lies within the precoxa; it is the balancing organ of the prawn. The coxa is short; it is provided with sensory hairs or setae. The basis is slightly longer than the coxa and carries a pair of many jointed feelers or flagella.
What are the cephalic appendages of a prawn?
Cephalic Appendages (Fig. 25.2) of Prawn: 1. Antennules: Each consists of a three- jointed protopodite bearing three many, jointed flagella at the distal end and a statocyst at the base. Sensory and tactile. 2. Antennae: Each consists of a two- jointed protopodite bearing a flat squama and a many-jointed flagellum. Tactile and balance.
What makes up the protopodite of a prawn?
Its protopodite consists of three segments: precoxa, coxa and basis. The procoxa is very large and carries a spine on its outer side. There is a shallow depression on its dorsal surface, bearing the opening of the statocyst.
What is the name of the first antenna on a prawn?
First antenna or Antennule, Second antenna, Mandible, First maxilla or Maxillula and Second maxilla are known as cephalic appendages. The remaining eight pairs are called thoracic appendages or periopods, which include three pairs of Maxillipeds and five pairs of walking legs. First antenna is also known as antennule (Fig. 18.3A).