园林景观工程模板

Spider, an arthropod with a body length of 1-90 millimeters, is divided into two parts: the head, chest (anterior body), and abdomen (posterior body). The head, chest, and chest are covered with a carapace and a sternum. There are two pairs of appendages on the head and chest, with the first pair being a chelon limb, with chelon teeth and toxic glandular openings at the tip of the chelon teeth; The chelon limbs of the suborder Palatae move forward and backward, while those of the suborder Palatae move laterally and in opposite directions; The second pair is the tentacle, which forms a foot like structure in females and immature males, used to hold food and serve as sensory organs; But in male adult spiders, the end egments of the whiskers expand and become the junction apparatus for transporting sperm.