Why Spiders Are Not Insects
WouterArachnids are an evolutionary group of creatures. They are a lot like insects, but they do not have the same characteristics. Spiders, however, have many features that are not found in insects.
For instance, spiders have a great deal of neurons, which help them process their environment. In addition, they have several senses. These include the ability to smell, taste, and feel vibrations.
Some insects also have a great deal of sensory equipment. This includes a chelicerae, which is a hollow tube in the abdomen. The chelicerae contains venomous glands that allow the spider to inject venom into its prey.
Another feature that spiders have is the ability to spin a web. In fact, some spiders build elaborate systems that can be as long as 25 feet. Other spiders create trip lines.
Despite the fact that both spiders and insects have similarities, there are some key differences. First, spiders have eight legs. Insects have six.
Second, spiders do not have wings. Moreover, they do not have compound eyes.
Third, spiders can molt. Insects molt, too. However, arachnids have an exoskeleton, which they can shed to aid their growth.
Finally, spiders have a complex neurological system, which helps them navigate and eat. Spiders can sense light and dark and even vibrate. Unlike insects, they are able to perceive vibrations in their surroundings.
One of the most interesting things about spiders is their ability to spin silk. Their silk is a hard substance that hardens on contact with the air. It is used for a number of reasons, including lining holes and wrapping eggs.
