The air above an airplane wing in flight is at lower pressure than the air below the wing. Hope this helps.
In flight, the air pressure above the wing is less than that below it.
Wing is a noun; and airplane is a noun being used adjectivally.
The fin and rudder help to keep the airplane flying straight and to steer properly. It is an airflow surface similar to the wing.
The wing is the main flying surface. Control surfaces include the ailerons, flaps and slats.
It's important because it is the aircraft's means of getting lift and flying.
Low pressure is created over the top of the wing while higher pressure is below the wing which generates lift.
A flying wing is essentially an airplane with the fuselage missing or embedded into the wing. The aircraft appears to be largely just a wing. The B2 bomber is a flying wing. There are other examples. The ultralight of many years ago called the Mitchell Flying Wing was a wing with the pilot slung underneath. There are other examples. They tend to have control sensitivities in the directions of pitch and yaw. Computers and active control surfaces assist in controlling the B2.
The force that pushes an airplane wing up is called lift. Lift is generated by the difference in air pressure above and below the wing, created by the wing's shape and angle of attack. This force allows the airplane to overcome gravity and stay airborne.
When the air above an airplane wing moves faster than the air below it, a pressure difference is created. This pressure difference generates lift, as the higher pressure below the wing pushes the aircraft upward. This is known as Bernoulli's principle, where increased air speed above the wing results in decreased pressure and lift.
The lift on an airplane wing increases as the speed of the airplane increases due to the Bernoulli's principle. Faster airspeed over the wing creates lower pressure, and higher pressure underneath the wing generates lift. This relationship creates more lift force as airspeed increases.
The wing that has a longer wing cause it could fly longer.
That is a monoplane. The one in the picture above is a biplane.