11.   The camera is within an endoscope, a hollow tube that also contains fiberoptics.

12.   The catheter, or sheath, is a hollow tube ringed with optical fibers that the beam of an excimer laser to the tip of the catheter.

13.   The latest is a Gore-Tex-like hollow tube implanted for better poutiness.

14.   Think of the colon as a hollow tube that pushes it contents forward with muscle contractions, a process known as peristalsis.

15.   Dialyzers are hollow filtering tubes that are attached to dialysis machines, which clean impurities from blood of patients with kidney failure.

16.   In the lab work, Turner explained, the cow and hamster cells line long hollow tubes.

17.   The water forms a tiny hollow tube, like a capillary, that allows the ink, or other materials, to flow to the surface.