EGD or Upper Endoscopy Procedure. The device used during an EGD procedure is called a flexible endoscope. It is tubular in shape and is very similar to the colonoscope that gastroenterologists use to examine a patientâs colon during a colonoscopy procedure, just thinner in diameter.
What causes ocean currents? Ocean currents result from two processes - the action of wind on the surface of the water, and from variation in water temperature that causes movement- a process known as convection. Convection occurs because the oceanic waters heat up becoming less dense.
currents and cold deep currents. Changes in the density set these currents in motion. Some ocean currents are set in motion by the wind. Other ocean currents are created by something you canât see or feel. Differences in the density of water can also cause currents to form and move. Density is affected by temperature and salinity.