1. The body length is slightly flat and looks like a cylinder at first glance. It is about 2 ~15cm long and 2mm ~1.5cm wide.
2. The back is bluish with black, with five yellow longitudinal stripes, and the ventral side is flat, gray-green, without mottling, and the overall ring stripes are remarkable. The body joint consists of five rings, each of which is about the same width.
3. There are 10 eyes, which are arranged in a ∩ shape. There are three semicircular jaws in the mouth to form a Y-shape. When sucking the animal's body, the jaw is used to drill into the skin. The car body is large, with a length of 60- 120mm and a width of 13- 14 mm.
4. The back is dark green with five longitudinal stripes, which absorbs blood and stores it in the whole digestive tract and blind sac from pharynx to esophagus. All parts of the body have drainage holes, which open on the ventral side. The distance between male and female reproductive holes is 4 rings, and each opening is between rings. The front sucker is easier to see, and the rear sucker is more obvious, with strong adsorption.
Distribution of leeches:
Leech, commonly known as leech, was mainly caught by nature in history. Due to the abuse of pesticides and fertilizers and the environmental pollution caused by industrial and agricultural "three wastes" in recent years, wild natural resources have been sharply reduced. With the further development of medicinal value of leech, its market demand potential is huge.
Leech, also known as medical leech, commonly known as leech, is distributed all over the world, with more than 300 species, and there are more than 100 species in China. It is found in lakes, ponds and paddy fields in most parts of China.
Mainly produced in Weishan, Dongping, Nanyang Lake and other lakes in Shandong Province, Weishan Lake has the largest output, which is not only supplied to this province, but also sold to Northeast China, Hebei, Shanxi and other places. Some products produced in the suburbs of Suzhou and Wuxian in Jiangsu are also exported. In addition, Zhejiang, Anhui, Hunan, Hubei, Sichuan, Shaanxi, Hebei, Liaoning, Jilin, Heilongjiang and other places also have production and sales.