What is cephalothorax with example?

The combined head and thorax of arachnids, such as spiders, and of many crustaceans, such as crabs. … An example of a cephalothorax is the head and chest of a crab. noun. (anatomy) The fused head and thorax of spiders and crustaceans.

What is a cephalothorax abdomen?

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 cephalothorax Class 9?

The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind.

What animals have a cephalothorax?

cephalothorax In some members of the phylum Arthropoda, the fused head and thorax. It is found in members of the Chelicerata (classes Merostomata, Arachnida, and Pycnogonida), and in most Crustacea.

What is the difference between cephalothorax and abdomen?

What is the difference between Cephalothorax and Abdomen? … Cephalothorax is an anterior region while the cephalothorax is a posterior region of the body. • Cephalothorax is a fusion of two main body regions, whereas the abdomen is one distinctive region.

What is a cephalothorax on a spider?

The cephalothorax is the first of 2 body parts on a spider. It is a combination of the head and thorax, and on it are found the legs, eyes, pedipalps, chelicerae, and other mouthparts.

What is the difference between cephalothorax and thorax?

As nouns the difference between thorax and cephalothorax

is that thorax is the middle of three distinct divisions in an insect, crustacean or arachnid body while cephalothorax is (anatomy) the fused head and thorax of spiders and crustaceans.

Do ticks have a cephalothorax?

All adult ticks have four pairs of legs, no antennae and two fused body parts (head and cephalothorax).

Are crabs cephalothorax?

crab, crustacean with an enlarged cephalothorax covered by a broad, flat shell called the carapace. … Although they are capable of locomotion in all directions, crabs tend to move sideways; swimming crabs have the last pair of legs flattened to form paddles.

Do all arthropods have cephalothorax?

Most arthropod’s bodies have three sections – the head, the thorax, and the abdomen. The thorax is the part of the body between the head and the abdomen. In some species of arthropods, the head and the thorax are one section called the cephalothorax. … Most arthropods that live in the water have gills.

What is the importance of cephalothorax?

Spiders possess a patella and metatarsus not found in insects. The abdomen is connected with the cephalothorax by a narrow pedicel, which provides great flexibility and movement between the two body regions.

Which arthropods have a cephalothorax?

Arachnids. Arachnids are a group of arthropods that include spiders and ticks. They have two body parts: the cephalothorax (head-middle) and the abdomen.

Is cephalothorax found in earthworms?

Option C Cephalothorax: The cephalothorax, also known as the prosoma, is the most anterior of the body sections. The cephalothorax features eyes, mouth. The cephalothorax is more rigid than the abdomen and contains the muscles used to operate the limbs.

What is the cephalothorax of a crayfish?

The cephalothorax consists of the cephalic (or head) region and the thoracic region. The part of the exoskeleton that covers the cephalothorax is called the carapace. The abdomen is located behind the cephalothorax and consists of six clearly divided segments. The cephalothorax consists of 3 segments.

Do insects have a cephalothorax?

Insects are invertebrates because they don’t have a vertebral column (backbone). Instead, they have a hard exterior covering, called an exoskeleton. … Unlike insects, arachnids have eight legs and no antennae or wings, and their body is divided into two main segments: A cephalothorax and abdomen.

Do cockroaches have cephalothorax?

The cockroach has a hard exoskeleton consisting of different parts. In the cephalothorax, there are antennae, compound eyes and small ocelli close to the antennae. The compound eyes consist of small ommatidia, which can be seen through a microscope. In the end of the abdomen you can also find cerci (bristles).

What is the dorsal side of the cephalothorax called?

The carapace, a shield of chitin, covers the dorsal surface of the cephalothorax. On the carapace, locate the indentation known as the cervical groove.

What is the name for the 5 pairs of appendages connected to the crab’s chest?

decapod, (order Decapoda), any of more than 8,000 species of crustaceans (phylum Arthropoda) that include shrimp, lobsters, crayfish, hermit crabs, and crabs. The presence of five pairs of thoracic legs (pereiopods) is the basis for the name decapod (from the Greek meaning “10 legs”).

Do cockroaches feel pain?

As far as entomologists are concerned, insects do not have pain receptors the way vertebrates do. They don’t feel ‘pain,’ but may feel irritation and probably can sense if they are damaged. Even so, they certainly cannot suffer because they don’t have emotions.

What is the white stuff in roaches?

Spiracles are visible on the sides of the cockroach’s body; these are used for breathing. Inside their bodies, cockroaches contain a white substance known as fat bodies. Similar to fat stores in humans, fat bodies allow cockroaches to store energy after nutrients have been broken down.