Scolopendra's feet are hooked and sharp, and there are poisonous glands at the hook end, which are generally called palatal teeth, claws or poisonous limbs, and can discharge poisonous juice. After being bitten by centipede, its venom glands secrete a large amount of venom, which is injected into the skin of the bitten person along the mouth of the venom glands of palatine teeth to cause poisoning. The toxin is not strong, and it will be painful but not fatal after being stung.
Medicinal centipede is a large lipped polypod with only 2/kloc-0 pairs of walking feet and/kloc-0 pairs of jaw feet. Chikawa, a close relative of centipede, has only 15 pairs of walking feet and 1 pairs of jaw feet. "Stone centipede" has only 15 feet. There are also some centipedes with much shorter feet, including 35 pairs, 45 pairs and as many as 750 pairs.
digestive system
The digestive system consists of digestive tract and digestive glands. Food enters the digestive tract from the mouth, and is absorbed and utilized by centipede through mechanical action and chemical decomposition.
The digestive tract is relatively simple, with a straight tube running through the center of the body from the mouth to the anus, and a swollen pharynx behind the mouth. The contraction of the pharynx is conducive to sucking food. The digestive tract after swallowing is divided into three parts: foregut, midgut and hindgut. The foregut and hindgut are shorter, but the midgut is longer. The foregut mainly plays the role of accepting, transporting and preliminarily digesting food.
The midgut is the main place for food digestion and absorption, and the hindgut is responsible for the formation of feces, which are transported to the anus of caudate segment for excretion. Digestive glands are a pair of grape-shaped salivary glands, which lead to the foregut through salivary gland ducts. Salivary glands can secrete saliva containing digestive enzymes, which can moisten and preliminarily decompose food.