The phrase "allow the passage of" is correct and usable in written English.
It can be used in contexts where you want to indicate permission or facilitation for something to move through or be transmitted.
Example: "The new policy will allow the passage of more light into the building, improving the overall atmosphere."
Alternatives: "permit the flow of" or "facilitate the movement of".
The hole is designed to allow the passage of air if someone accidentally swallows it and it blocks their windpipe.
The pores of the high permeability membranes allow the passage of plasma but prevent that of blood cells.
In contrast, the lower esophageal sphincter (LES) maintains a sustained pressure, and relaxes to allow the passage of a bolus.
The analogue circuits simulate the ion channels in a cell's membrane, which allow the passage of a signal's charged particles into and out of the cell body.
The original canal did not permit two-way traffic, and ships would stop in a passing bay to allow the passage of ships in the other direction.
Doctors performed an angioplasty on Dec. 11, inserting a stent into Sabathia's artery to allow the passage of blood to his heart.
Building on these insights, he showed newly created proteins with the ability to integrate into membranes and form pores that allow the passage of ions and small molecules.
On March 5th France, Russia and Germany said they would not "allow the passage of a planned resolution that would authorise the use of force" against Iraq.
There are channels called gap junctions that allow the passage of molecules between pairs of cells (see below The cell matrix and cell-to-cell communication).
The channels are opened by depolarization (an increase in membrane potential) of the nerve terminal membrane and selectively allow the passage of calcium ions.
These are pathways made of polystyrene that has been treated so it will allow the passage of only one sort of ion either sodium or chloride.
