Multiple endoscopic biopsy specimens were obtained from the second part of the duodenum from 11 untreated CD patients (eight females, mean age: 42.5 years, range: 18–66), 12 treated CD patients (nine ...

Species throughout the animal kingdom feature vital interfaces between the outermost layers of their bodies and the environment. Intricate microscopic structures—featured on the outer skin layers of ...

Following years of research and the power of a technologically advanced instrument, scientists have detailed the complex nanoscale exoskeleton patterns of the roundworm, a model laboratory organism, ...

As organisms develop from embryos, groups of cells migrate and reshape themselves to form all manner of complex tissues.