Seven Fun Facts About Spiders




A lot of people fear spiders because some of them are poisonous. Other people fear the thought of being bitten. Let's explore spiders in general and give you some facts about common spiders.
Though spiders have simple eyes, they usually are not well developed. Instead, spiders use vibrations, which they can sense on the surface of their web. The tiny bristles distributed all over a spider's body surface, are actually sensitive tactile receptors. These bristles are sensitive to a variety of stimuli including touch, vibration, and airflow.
Spiders are arthropods, so their skeletal system of their body is the outermost layer. The hard exoskeleton helps the spider maintain moisture and not dry out. The bristles are not hair, but actually part of their exoskeleton.
The word spider is from an Old English verb spinnan, meaning "to spin." Web weavers use the tiny claws at the base of each leg, in addition to their notched hairs, to walk on their webs without sticking to them.
Spiders digest their food outside their body. After the prey is captured, spiders release digestive enzymes from their intestinal tract and cover the insect. These enzymes break down the body, which allows the spider suck up the liquid prey.
The feared tarantula isn't poisonous. A tarantula's bite can be painful, but it isn't any more dangerous than a bee sting.
A Daddy-long-legs isn't a spider, though it looks a lot like one. It doesn't have a waist between its front body part and its abdomen. Its legs are longer and thinner than a spider's, and it carries its body hung low.

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