What are the functions of the 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 Pedipalps?
Pedipalps are used for a variety of purposes, including prey capture, defense, courtship, and burrow excavation. A pair of legs are found on each of segments three through six.
What are chelicerae used for?
6 days ago
The first pair, the chelicerae, often have claws or fangs. 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).
What is the difference between prosoma and opisthosoma?
As nouns the difference between prosoma and opisthosoma is that prosoma is (zoology) the front segment of a body which is divided into two or more segments, especially the cephalothorax of an arachnid while opisthosoma is the posterior abdomen of the chelicerates, a phylum including horseshoe crabs,.
What is the function of the cephalothorax in a crayfish?
The cephalothorax is a region where many vital organs of the crayfish are contained such as the heart, the reproductive organs, the digestive gland, the stomach, the esophagus, the ventral artery, and the ventral nerve cord.
What is the main difference between the cephalothorax and the abdomen?
The abdomen is located behind the cephalothorax and consists of six clearly divided segments. The cephalothorax consists of 3 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 are pedipalps quizlet?
pediaplps- an appendage that aids in chewing.
Do all arthropods have pedipalps?
Pedipalps (commonly shortened to palps or palpi) are the second pair of appendages of chelicerates – a group of arthropods including spiders, scorpions, horseshoe crabs, and sea spiders. The pedipalps are lateral to the chelicerae (“jaws”) and anterior to the first pair of walking legs.
What are chelicerae and Pedipalps?
Pedipalp are chelate, or pincerlike, and are used to hold and crush prey. Among spiders the basal segment of the chelicerae contains venom sacs, and the second segment, the fang, injects venom. The pedipalps, or palps, which in arachnids function as an organ of touch, constitute the second pair of appendages.
What is the function of the chelicerae in scorpions?
Despite this, one key characteristic is shared by all arachnids: two chelicerae, used for piercing, grasping, or chewing up food. In this case, each scorpion chelicera has a fixed and movable finger, giving this scorpion a somewhat toothy “smile.”
What are prosoma and opisthosoma on arachnids?
Background. Scorpions are arachnids with two body divisions: the combined head and thorax, referred to as the prosoma or cephalothorax, and the abdomen or opisthosoma. They possess large paired claws or pincers known as pedipalps and four pairs of legs.
How many segment are on the opisthosoma of scorpion?
In the embryos of extant scorpions, the anterior opisthosoma (the “abdomen” of arachnids, termed the mesosoma (ms) in scorpions) consists of eight segments (O1–O8) [5].
What is the opisthosoma?
It is a distinctive feature of the subphylum Chelicerata ( arachnids, horseshoe crabs and others). Although it is similar in most respects to an abdomen (and is often referred to as such), the opisthosoma is differentiated by its inclusion of the respiratory organs ( book lungs or book gills) and the heart .
What is the opithosoma of a horseshoe?
The opithosoma contains chiefly the musculature for the operation of the book gills and the telson, though the horseshoe’s 113 distinct muscle groups (comprising over 750 individual muscles) are not limited to this section of the body.
What is the opisthosoma in a scorpion?
The opisthosoma, or abdomen, contains the majority of the internal organs. In spiders, the prosoma and opisthosoma are joined by a narrow bridge called the pedicel. In scorpions, the two body segments are fused, and the opisthosoma is segmented and divided into two parts: the anterior mesosoma and the posterior metasoma, or tail.
What is the difference between the prosoma and opisthosoma in spiders?
In spiders, the prosoma and opisthosoma are joined by a narrow bridge called the pedicel. In scorpions, the two body segments are fused, and the opisthosoma is segmented and divided into two parts: the anterior mesosoma and the posterior metasoma, or tail.