The Bernoulli effect can also be used to patients’ benefit, for instance with the Venturi mask. For various medical reasons, some patients may benefit from air with greater than usual 21% ...

Bernoulli's equation along the streamline that begins far upstream of the tube and comes to rest in the mouth of the Pitot tube shows the Pitot tube measures the stagnation pressure in the flow.

That's how Bernoulli's principle works. It's much easier to comprehend if you think of fluids and gases as a collection of moving balls—which is essentially true. Now for the fun part.

Bernoulli's principle is a description of how gases and liquids (fluids) behave. It says that within a stream of fluid, pressure goes down at the same time as the speed of flow goes up.