Information

Arthropods (continued)


Arachnids

The arachnid class includes spiders, scorpions and ticks. Some venomous species of spiders and scorpions can cause death, especially in young children. The number of accidents involving the poison of these animals is large in Brazil.

The body of arachnids is divided into cephalothorax and abdomen. These animals have four pairs of paws and have no antennae. They feature a pair of pedipalpos (palpation), which are sensory appendages, and also a pair of chelicera, tweezers.

Most arachnids are carnivorous. Some of these animals are parasites of vertebrate blood, such as ticks. THE scabies or scabies is caused by an arachnid, a mite.

The spider has in its abdomen its spinning glands, which produce the threads used to build nests or weave webs in the trees and corners where these animals live.