Radial: A word with diverse meanings in medicine and the biomedical sciences: 1  Pertaining to the radius, the smaller bone in the forearm. 2  The radial artery is so named because of its proximity to the radius. 3  Pertaining to the radius of a circle.
A 3D model of ethyne (acetylene), the simplest alkyne. In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbonâcarbon triple bond. The simplest acyclic alkynes with only one triple bond and no other functional groups form a homologous series with the general chemical formula CnH2nâ2.
The duodenum is the first segment of the small intestine and is also the shortest (about 25 centimeters, or roughly 10 inches). It starts at the pylorus and ends at the duodenojejunal junction. It has four parts: Superior part: Horizontal to and in front of the 1st lumbar vertebra.