Pet Spider
The most special internal structure of pet spiders is the book lung, which is the respiratory organ. The inside of the book lung is a sac, and the walls of each sac protrude inwards with many leaf-like folds, just like the pages of a book. . The venom glands of pet spiders are cylindrical, and the gland wall is formed by a layer of cells. There are ducts at the front of the venom glands, which open around the front ends of the claws. The venom glands exude venom, which is lethal to small animals, and some can also be life-threatening to humans. , if you are bitten by a red-spotted poisonous spider or cave-dwelling wolf spider, you must immediately adjust to avoid life-threatening injuries.
The digestive tract is divided into three parts: foregut, midgut and hindgut. The foregut includes the mouth, pharynx, esophagus and sucking stomach. The tubular pharynx and sucking stomach can suck liquid food into the digestive tract and transport it to the midgut. The midgut includes the central midgut tube and the blind sacs on both sides. After the midgut is the hindgut, where permeates accumulate.
A pair of penetrating organs originates from the Malpighian ducts of the endoderm. In addition to Malpighian ducts, spiderlings also have a pair of basal glands for penetration. However, the basal glands of adult spiders are often molted and have no penetrating efficiency.
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