In eukaryotic cells, there are many things with membranes around them.

The eyes are large and round, with nictitating membranes (protective third eyelids).

Extreme caution must be taken to avoid contact with eyes and mucous membranes.

He was barefoot; his fingers and toes were all a joint too long, with thin membranes between them.

More than half of all proteins interact with membranes.

It causes an inflammatory effect upon contact with the skin or mucous membranes.

The circular eyes are rather large and equipped with protective nictitating membranes.

With better membranes it is assumed that the power for a similar plant can be increased to about 10 kW.

It began with membranes enclosing the chemistry of a single cell, perhaps four billion years ago.

In the hospital, he underwent 99 procedures that involved the use of needles or contact with mucous membranes.