Irritable Bowel Syndrome (IBS) The exact cause of irritable bowel syndrome (IBS) isn't known. But health experts believe that faulty communication between the brain and the intestinal tract is one cause of symptoms. In some people, this miscommunication causes abnormal muscle contractions or spasms, which often cause cramping pain.
Solid Wood Floor. Solid wood flooring is exactly what the name implies: a solid piece of wood from top to bottom. The thickness of solid wood flooring can vary, but generally ranges from 3/4â to 5/16â. Solid wood can be used in any room that is above grade (above ground).
Introduction. 1  What is your body made of? Your first thought might be that it is made up of different organsâsuch as your heart, lungs, and stomachâthat work together to keep your body going. 2  Atoms and molecules follow the rules of chemistry and physics, even when they're part of a complex, living, breathing being.