They talk to each other across the fluid, through membranes.

A small test incision is being made through the membrane.

The water passes through the membrane into the sugar solution.

Therefore it is likely that the agent can easily pass through membranes.

Thus the total current through the membrane is given by:

He looks up through the membrane at the nacreous blue sky.

The fitness culture is one of the tactics people have taken up to punch their way through the social membrane.

He was back at the place where he had been thrown through the membrane.

Amanda Bates looked in at us through the exposed membrane.

The silence was total except for the singing of the blood through the aural membrane.