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.
Convection currents are caused by the inner core, which is the  Inner layer of the Earth.    Convection currents begin due to the extreme heat of the inner  core.The â¦ inner core heats up the very bottom of the mantle. The  heated up substances within the mantle has a higher temperature  than those higher in the mantle and closer to the surface of the  earth.onvection currents are caused by the inner core, which is the  Inner layer of the Earth.    Convection currents begin due to the extreme heat of the inner  core.