Abdominal x-ray as a scout film for other procedures such as barium enemas. An upper gastrointestinal series is where a contrast medium, usually a radiocontrast agent such as barium sulfate barium salt mixed with water, is ingested or instilled into the gastrointestinal tract, and X-rays are used to create radiographs of the regions of interest. The barium enhances the visibility of the relevant parts of the gastrointestinal tract by coating the inside wall of the tract and appearing white on the film. A lower gastrointestinal series is where radiographs are taken while barium sulfate, a radiocontrast agent, fills the colon via an
Tenthredo colon Tenthredo colon Tenthredo colon is a sawfly species belonging to the family Tenthredinidae (common sawflies). "Tenthredo colon" can reach a length of about . These sawflies have black head and thorax. Abdomen is black with a reddish area towards the tip. Legs are reddish. Antennae are black, with white tips. The larvae are pale brown with a characteristic diamond pattern of diagonal cross lines and a darker brown mark on the head. The adults can be encountered from May through August feeding on nectar (especially on "Anthriscus sylvestris"). The larvae can be found in September. They are polyphagous, but mainly