What are arachnids physical characteristics?

What are arachnids physical characteristics?

Physical characteristics Arachnids have paired, jointed appendages (parts that are attached to the main body), a hardened exoskeleton (exo means “outer”), a segmented (divided into parts) body, and a well-developed head. Their body consists of two main parts: a fused head and thorax, and an abdomen.

What is the major morphological characteristic of an arachnid?

Most arachnids share certain characteristics including: (i) a body divided into two parts, the cephalothorax or prosoma and the abdomen or opisthosoma; (ii) no antennae; (iii) chelicerae; (iv) a unique pair of appendages in the front of their bodies called pedipalps involved in feeding and/or mating; (v) four pairs of …

What are the distinguishing characteristics of Araneae?

Like other arachnids they have eight legs (insects have only six), and they also have either six or eight eyes as well as two body segments (insects have three). The first is a fused head and thorax called the cephalothorax, followed by the abdomen which is where all those legs are attached.

What characteristics of a spider qualify him?

These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed. Spiders also have several adaptations that distinguish them from other arachnids.

What makes a spider special?

Most people are familiar with the basic characteristics of spiders: they have eight legs, they can shoot silk out of their abdomen and frequently use it to build elaborate webs, and they prey on insects.

What are three interesting facts about spiders?

6 Interesting Facts About Spiders

  • All spiders produce silk.
  • One species is mostly vegetarian.
  • Spiders are nearsighted.
  • Females can lay up to 3,000 eggs at one time.
  • Jumping spiders can jump up to 50x their own length.
  • The ‘daddy long-legs’ you see might not actually be a spider.

How many hearts does a spider have?

Spiders have the open circulatory system, which is different from that in mammals that have the closed circulatory system. The spiders has 1 heart that’s a muscular tube pumping the hemolymph into the open circuit.

What body parts do spiders use for protection?

In most spiders, the toughest part of the exoskeleton is the carapace, which sits on top of the front section of the body; the cephalothorax. The carapace helps to protect the spider’s delicate eyes, mouth and other sensory organs. On the underside of the cephalothorax is another toughened plate called the sternum.

How do spiders protect their self?

Some spiders defend themselves in strange ways indeed. Certain tarantulas have urticating hairs on their bellies. These hairs have barbs on them which cause irritation and pain. Orb spiders make body doubles of themselves out of dead bugs and silk to defend themselves from predators while in their webs.

Is it bad to kill spiders?

Although they are generalist predators, apt to eat anything they can catch, spiders regularly capture nuisance pests and even disease-carrying insects – for example, mosquitoes. So killing a spider doesn’t just cost the arachnid its life, it may take an important predator out of your home. It’s natural to fear spiders.