Define Arachnids?

Answer 1

Arachnids are a group of arthropods that includes eight-legged invertibrates like spiders,scorpions,daddy-long legs etc.
Arachnid body parts are divided into two main groups:-
a)anterior-The anterior is also called cephalothorax,and it contains sense organs,mouthparts,and limbs in pairs.The first pair of limbs are called chelicerae,and they usually form the pincers or poison fangs,and the second pair,the pedilaps,form pincers,feelers,or legs.The other limbs are used for walking.
b)posterior:-The posteriorpart of the body,the abdomen,contain genital openings and other structures,and contains book lungs(modified gills).

Answer 2

The arachnids, are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. Arachnids are named after the mythological figure Arachne. They are chiefly terrestrial arthropods, comprising some 65,000 to 73,000 named species including spiders, scorpions, harvestmen, ticks, and mites.

Arachnids may be easily distinguished from insects by the fact that arachnids have eight legs whereas insects have six. The chelicerae serve to macerate food particles. The first post-oral pair of appendages —pedipalps (leg-like mouthparts) — of some species have been adapted for sensory, prey capture or reproductive functions. In Solifugae, the palpi are quite leg-like and make Solifugae appear to have ten legs. The larvae of mites have only six legs; the fourth pair appears when they moult into nymphs. Arachnids are further distinguished by the fact they have no antennae and no wings. They have a two-segmented body, made up of a cephalothorax and an abdomen, the cephalothorax being derived from the fusion of the cephalon (head) and the thorax.

Arachnids are mostly carnivorous, feeding on the pre-digested bodies of insects and other small animals. Many are venomous - they secrete poison from specialized glands to kill prey or enemies. Others are parasites, some of which are carriers of disease. Arachnids usually lay eggs, which hatch into immature adults.

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Answer 3

The arachnids, are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. Arachnids are named after the mythological figure Arachne. They are chiefly terrestrial arthropods, comprising some 65,000 to 73,000 named species including spiders, scorpions, harvestmen, ticks, and mites.

Arachnids may be easily distinguished from insects by the fact that arachnids have eight legs whereas insects have six. The chelicerae serve to macerate food particles. The first post-oral pair of appendages —pedipalps (leg-like mouthparts) — of some species have been adapted for sensory, prey capture or reproductive functions. In Solifugae, the palpi are quite leg-like and make Solifugae appear to have ten legs. The larvae of mites have only six legs; the fourth pair appears when they moult into nymphs. Arachnids are further distinguished by the fact they have no antennae and no wings. They have a two-segmented body, made up of a cephalothorax and an abdomen, the cephalothorax being derived from the fusion of the cephalon (head) and the thorax.

Arachnids are mostly carnivorous, feeding on the pre-digested bodies of insects and other small animals. Many are venomous - they secrete poison from specialized glands to kill prey or enemies. Others are parasites, some of which are carriers of disease. Arachnids usually lay eggs, which hatch into immature adults.

Answer 4

Arachnids have two main body divisions, the cephalothorax and the abdomen. The adults all have 8 legs, although some immature stages may only have 6.

Answer 5

The arachnids, are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. Arachnids are named after the mythological figure Arachne. They are chiefly terrestrial arthropods, comprising some 65,000 to 73,000 named species including spiders, scorpions, harvestmen, ticks, and mites.

Answer 6

Arachnids is just another name for a spider, anything with 8 legs is a spider/arachnid

Answer 7

Arachnids are everything that includes spiders, ticks, Daddy long legs (they are NOT spiders) and scorpions.
One of the main rules is to have 8 legs no matter what. Unlike insects must do carry a type of venom or are parsitic (ticks), they are commonly missclasfied from insects, but they are an entire different family . Almost all are meat eaters (and blood suking).

Answer 8

jmj's answer is excellent, and pretty much covers everything.

I just wanted to add that there are 11 Orders of Arachnids, including:

Acari or Acarina: Mites and ticks
Amblypygi: Tailless whipscorpions
Araneae: Spiders
Opiliones: Harvestmen or daddy longlegs
Palpigradi: Palpigrades
Pseudoscorpiones: False scorpions
Ricinulei: Hooded tick spiders
Schizomida: Micro-whipscorpions
Scorpionida: True scorpions
Solpugida: Windscorpions or camel spiders
Uropygi: Whipscorpions

Answer 9

Arachnids are spiders. They have 8 legs.

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Answer 10

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