
Glossary
I
- In situ
- In the original position.
- Insulin
- A hormone made by the islet cells of the pancreas; insulin controls the levels of glucose in the blood.
- Internal carotid artery
- The main blood vessel supplying blood to the brain.
- Interstitial
- The space between cells.
- Intima
- Innermost layer of a blood vessel.
- Intracranial
- Inside the skull.
- Intrinsic
- Inherent; part of the essential nature.
- Intubation
- Placement of a breathing tube into the trachea, usually via the mouth, to assist breathing.
- Invasive
- 1) Medical procedures requiring introduction of an instrument into the body. 2) Marked by the tendency to spread, especially into healthy tissue.
- Investigational product
- A pharmaceutical form of an active ingredient or placebo being tested or used as a reference in a clinical trial.

