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 organisms have 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 does a cephalothorax consist of?
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. (The terms prosoma and opisthosoma are equivalent to cephalothorax and abdomen in some groups.)
Do all crustaceans have a cephalothorax?
Structure and Function. Crustaceans have three basic body regions: the head, thorax, and abdomen (although in many species the head and thorax have fused to form a cephalothorax). The head region has two pairs of antennae and three pairs of feeding appendages: a pair of mandibles and two pairs of maxillae.
What is the difference between cephalothorax and abdomen?
The abdomen is located behind the cephalothorax and consists of six clearly divided segments. The cephalothorax consists of 13 segments. Each segment of both the cephalothorax and the abdomen contains a pair of appendages. The head (or cephalic) region has five pairs of appendages.
What is the function of the cephalothorax in a crayfish?
Learning > Species > Crustaceans > Crayfish Glossary
| Term | Definition |
|---|---|
| cephalic | Directional term used to indicate “toward the animal’s head”, or anterior. |
| cephalothorax | Indicating the portion of the body containing the head and thorax, anterior to the abdomen. |
Where is the cephalothorax?
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.
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. Arthropods have an open circulatory system.
How many segment is the cephalothorax?
The cephalothorax consists of 13 segments. Each segment of both the cephalothorax and the abdomen contains a pair of appendages. The head (or cephalic) region has five pairs of appendages.
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.
What is the function of Chelicera?
They are used to capture prey (spiders), transport a spermatophore (sunspiders, some mites and ticks), produce sounds (sunspiders, some spiders), cut strands of silk (web-dwelling spiders), and produce silk (pseudoscorpions).
Does a crayfish have a cephalothorax?
Like all crustaceans, a crayfish has a fairly hard exoskeleton that covers its body. As shown in the diagram on the next page, its body is divided into two main parts, the cephalothorax and the abdomen. The cephalothorax consists of the cephalic (or head) region and the thoracic region.
Which part of the crayfish the cephalothorax and abdomen is more flexible?
The abdomen is flexible and the segmentation is visible here. The appendages of the crayfish attach to both the cephalothorax and the abdomen.
Is cephalothorax found in cockroach?
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).
Which arthropod classes have a cephalothorax?
The Class arachnida is a large and diverse group. All arachnids belong to a subphylum (a division of Arthropoda) known as the Chelicerata, of which there are approximately 65,000 described species (~8,000 in North America). They are characterized by having two body regions, a cephalothorax and an abdomen.
What arthropods has a cephalothorax?
Can spider fangs break off in skin?
All spiders have fangs and some spider fangs can break through human skin and inject venom causing harm.
What is the function of chelicera Chelipeds?
What is the function of chelicera? to inject poison. What is the function of the chelipeds? claws.