because they are simple organism
The anus is the last part of the digestive tract.
That wavelike movement of the digestive tract is known as peristalsis.
The digestive tract and reproductive organs of an Ascaris are free floating within the body and do not attach to the body wall. Ascaris do not have any other internal organs other than the gut and internal reproductive organs, as breathing and waste excretion are handled externally within the body wall.
The digestive tract consists of the mouth, the throat, the stomach, the intestines, the rectum, and the anus. The liver and pancreas are attached to the digestive tract by the means of tubes, so they can supply their own digestive fluids and enzymes, however they do not lay within the digestive tract.
Water is primarily absorbed in the small intestine of the digestive tract.
The Digestive Tract
the digestive tract
E. coli bacteria grow in the digestive tract.
fiber
the parts are: mouth, tongue, palate, bolus, teeth, espigolthis, esophagus, stomach, pancreas, gallbladder, liver, small intestine large intestine. if u don't feel satisfied u may look at WWW.encyclopedia.com
Cornea of the eyes Caecum in the digestive tract Colon in the digestive tract