This cross section through the head of a jumping spider shows off the interior structure of four of its eight eyes. Jumping spiders have the most acute vision of any terrestrial invertebrate. In fact, ...

Harvard Pest Control stated in a news release, “Spiders have a two-part body composed of the cephalothorax ... spaced out on ...

where the legs connect to the body. The base of the fiddle typically covers the head, with the neck extending down toward the abdomen. The venom of brown recluse spiders is both cytotoxic and ...