Diagram of a plica circulares. This is a diagram which shows the villi of the small intestine, as indicated by the arrows in the diagram above, at higher magnification. The main functions of the small intestine are digestion, absorption of food and production of gastrointestinal hormones.
Navy Divers perform underwater salvage, repair and maintenance, submarine rescue and support Special Warfare and Explosive Ordnance Disposal while using a variety of diving equipment. They also maintain and repair diving systems. Navy Diver class A school is 15 weeks in duration, and it is located in Panama City, Florida. Before attending the class A school, a seven week preparatory school will be completed at Naval Training Center, Great Lakes, Illinois. The Navy Diver rating requires a minimum of a six year enlistment obligation. Navy Diver (NOS E100) Enlistees are taught the fundamentals of diving through formal Navy schooling and on the job training.
Scuba diving is a form of underwater diving where the diver uses a self-contained underwater breathing apparatus (scuba) which is completely independent of surface supply, to breathe underwater.[1] Scuba divers carry their own source of breathing gas, usually compressed air,[2] allowing them greater independence and freedom of movement than ...