Table of Contents
What structures do crustaceans have?
Structure of crustaceans Crustaceans have three distinct body parts: head, thorax, and abdomen (or pleon), although the head and thorax may fuse to form a cephalothorax. The head bears two pairs of antennae, one pair of compound eyes and three pairs of mouthparts.
What are the main characteristics of crustaceans?
A crustacean has the following features:
- a segmented body with a hard exterior (known as an exoskeleton)
- jointed limbs, each often with two branches (termed biramous)
- two pairs of antennae.
- gills.
What other structure might the crayfish use to swim quickly?
They use their swimmerets and uropods/telson for swimming; the combination of the telson and . dropods form a tail-like structure. To swim quickly they contract their muscular abdomen, propelling . themselves backwards as their uropods (modified swimmerets) push the water along their ventral surface.
Which structures does the crayfish use to sense things in its environment?
The antennae and compound eye. The 2 antennas on crayfish are the sensory structures. They touch and feel things.
What 3 major characteristics do all arthropods have?
All arthropods posses an exoskeleton, bi-lateral symmetry, jointed appendages, segmented bodies, and specialized appendages. The major arthropod classes can be separated by comparing their number of body regions, legs, and antennae.
What kind of skeleton does a crayfish have?
Like all crustaceans, crayfish do not have bones (spine) or any internal skeleton. Their body is covered with an exoskeleton (heavily calcified shell), which is divided into two main parts: 1. The cephalothorax The cephalothorax (cephalic+ thoracic) consists of the cephalic (or head) region and the thoracic (or chest) region.
What kind of body structure does a crustacean have?
The subphylum is split into five classes: Malacostraca, Maxilipoda (barnacles and copepods), Branchiopoda (brine shrimp and Cladocerans), Remipedia, and Ostracoda. Crustacean body structure. The body of a crustacean can be divided into the head, thorax and abdomen.
Where are the organs located in a crayfish?
As a typical decapod crustacean (the name Decapoda from the Greek means “10 legs”), Crayfish’s body is divided into two main parts: cephalothorax and abdomen. The majority of the internal organs are located in the cephalothorax of the crayfish (the head and chest area).
What does the head of a crayfish do?
The head of the head also contains two pairs of antennae, an oral apparatus, and five pairs of walking legs. Each of them performs certain functions. For example, the first pair ends with powerful claws that serve to grab food, tear it into pieces and protect it from enemies.