消化道的后三分之一是肠，肠与嗉囊之间有一个幽门括约肌，肠可以是一根简单的管道，也可以有4对细长的侧盲囊。肠是食物消化的主要场所，蛭类的消化道中很少有淀粉酶、脂肪酶、蛋白水解酶、肽链内切酶，至今发现的主要是肽链外切酶。

　　The digestive tract after a third is im, im a pyloric sphincter, between crop and im can be a simple pipe, also can have 4 of slender lateral diverticulum. Im is the main place to food digestion, leeches in the digestive tract of few amylase, lipase, proteolytic enzyme, endopeptidase, mainly peptides have been discovered outside restriction enzymes.

　　Related studies have shown that, in the digestive tract is a kind of symbiotic vermiculite false single spore bacilli decompose protein and fat. Im rear is short of the rectum, rectum after to the anus, after the opening in the front of the suction cup.

　　水蛭的消化系统由口、  口腔、咽、食道、嗉囊、肠、直肠、肛门等8部分组成。水蛭的取食器官分为两类:棘蛭目和吻蛭，有奶水蛭目和咽蛭目，无吻。下面只介绍颚蛭目。颚蛭目虽无吻，但有一个肌肉质、能吸吮的咽部。

　　Leech's digestive system by mouth, oral cavity, pharynx, esophagus, crop, intestine, rectum and anus of eight parts. Leech of feeding organs are divided into two categories: spine vermiculite and kiss, leeches yard and pharynx vermiculite with milk, no kiss. Only introduce below jaw &co. Jaw vermiculite orders, although no kiss, but there is a muscle mass, can suck the pharynx.

　　颚上有细齿，吸血种类的齿小而尖，非吸血的齿大而钝。口腔后为一个肌    生肉质、圆筒式的咽，咽壁内有单细胞的唾腺，能分泌一种    蓬凝血的水蛭养殖素。

　　Jaw on the serration, vampire types of small, sharp teeth, the vampire teeth big and blunt. Mouth into a muscle after raw meat, cylinder type of pharynx, pharyngeal wall with single-celled salivary glands, can secrete a kind of loose clotting leech farming.

　　咽下面是一段很短的食道，开口到一个  ，较宽而长的嗉囊，嗉囊两侧有1～11对向两侧伸展的盲  :，最后一对盲囊很长，延伸至身体后端。嗉囊的功能是贮存食物，吸血种类的盲囊特别发达。

　　Of esophagus, the below is a short open to a wider and longer craw, pouches on both sides have 1 ~ 11 to stretch on both sides of the blind, and finally a pair of ceca is very long, extending to the back-end body. Crop is the function of storing food, blood-sucking species of ceca specially developed。