Abstract: An endoscope for inspection of the gastrointestinal tract of a mammal, in particular of the small intestine of a human, includes an elongated, flexible tubular structure and a flexible, elongated element placed inside the tubular structure such that a distal portion of the elongated element protrudes from a distal end of the tubular structure and is connected to an endoscopic tip, wherein the elongated element is engaged with the tubular structure in such way that a rotation of the tubular structure around the elongated element in a first rotation direction will increase a gap between the endoscopic tip and the distal end, while a rotation of the tubular structure around the elongated element in a second rotation direction, opposite to the first rotation direction, will decrease the gap between the endoscopic tip and the distal end.