First, the biological characteristic of the leech and life habits and acquired characteristics
The leech is commonly called as leeches , is also called ant's soft-shelled turtle among the people , bore the son etc. inside. Leech's link animal's leech's key link (Hirucina ) one is referred to as. Divide into Japan cure leech , wide body money line leech (popularize unit also call their money leech at present ) , dark brown willow leaf leech ,etc..
1.Japan cures leeches, has another name called the medical use leech, the body is sold narrowly and longly flatly , slightly take the form of cylinder, long 3-5cm of body, wide 0.4-0.5cm (regular ), bring black in the back is green, there are yellow 5 vertical lines, smooth belly, grayish green, there is no variegated stripe . Body ring is several 103, the clitellum is not remarkable, accounts for 15 rings , the grand gonopore is among 31-32 ring ditches, the female hole is among 36-37 ring ditches. 5 pairs of eyes, it is curved to arrange, there is sucking disc before one the body front belly, 6 vertical pleats of esophagus, 3 Hubei Province, half round, the tooth of Hubei Province is developed, there is sucking disc after one , the form of the bowl the back end belly, the orientation belly, the rectum carries the side in it. Live in the paddy field and marsh, suck people , domestic animal blood. Taking action quickly, can swim and move with one chi of climing types wave upon wave , spring is active when being warm, in order to lay eggs June - October one, the cushion is bent over in winter. Recycled strength very strong, is it raise to cut off it , can turn into and then new body by broken department.