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It has an open circulatory system from which a mixture of lymph and hemocytes, called hemolymph circulates freely dependent only on the peristaltic contraptions of the tubular heart. There is only one vessel in front of the heart that is called dorsal aorta.
The respiratory system or tracheal system it is composed by a net of tubes with a very thin wall. This net branches into every part of the body and opens to the exterior by spiracles.
3 areas compose the digestive system: the foregut that comprehends the mouth, salivary glands, esophagus and the crop (an organ for food storage); the midgut where the stomach and gastric ceca are located; the hindgut where the intestine, rectum and anus are. The biggest part of digestion nutrients absorption occurs in the midgut although the digestion starts in the foregut with the saliva there is no absorption there. In the hindgut occur mostly reabsorption of water but little absorption of nutrients.
