Where there is an obstacle, short lengths of flexible plastic tubing can be used instead.

Fine plastic tubing, called airline, takes the air to where it's needed.

The blood of the two donors snaked down the plastic tubing.

At least one company sells a pump that has no plastic tubing.

"I want to make everything out of plastic tubing," Jansen says.

Blood flowed back through the needle, filling the attached plastic tubing.

At its side was a coiled 40-foot line of thin, black plastic tubing.

A moment later, Decker saw clear liquid run through plastic tubing.

He tugged at a clear plastic tubing on my left side.

Today, they are usually made of plastic tubing.