Medical Definition of ARTHRODESIS. : the surgical immobilization of a joint so that the bones grow solidly together: artificial ankylosis. the surgical immobilization of a joint so that the bones grow solidly together. ADVERTISEMENT.
Trapdoor spiders are not particularly harmful to man however, like Tarantulas, the tiny hairs on the legs of some species leave tiny red marks where the toothed hairs on the spiders' feet have clung to the skin. Mouse spiders are also a type of Trapdoor spider with huge chelicerae and may measure up to 35mm in body length.
Their venom numbs the area so people canât feel the bites: Camel spiders are not venomous, and though their bites are painful, they are not deadly to humans, according to NSF. Camel spiders can run up to 30 mph (48 kph) and jump up to 3 feet (1 meter) high: The fastest camel spider clocks in about 10 mph (16 kph).amel spiders are primarily nocturnal and flee from the sun. Camel spiders are carnivores. According to Camelspiders.org, they eat other bugs, lizards, small birds and rodents. Despite their reputation and frightening appearance, they are of negligible threat to humans.