1.   At Canberra, Sir John used minuscule glass tubes inserted into nerve cells of animals to observe nerve cell activity.

2.   For now, an intravenous tube inserted in her chest pumps antibiotics into her fragile body.

3.   Holes had to be drilled in the trunk, rubber tubes inserted.

4.   She required a feeding tube surgically inserted in her stomach to receive nourishment initially.

5.   Virtual colonoscopy is much less invasive, with an air tube inserted an inch or two into the rectum so that the colon can be inflated.

6.   Holes were cut corresponding to the nostrils, and plastic breathing tubes inserted.