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.
How do some deep ocean currents form? Deep ocean currents are caused by 3 things:    change in temperature  change in salinity by evaporation  change in salinity by freezing   Because colder water and s â¦ altier water are more dense, they sink,  and the motion causes deep currents. 8 people found this useful. Manny de la Riva. 616,402 Contributions.