Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The penumbra effect illustrated. The outcome of an injured section of tissue separates into the immediate centre of cell death and a surrounding perimeter of viable cells that are stunted due to the spread of inflammation, as depicted in a blocked coronary artery (left), stroke (middle) and pancreatic islet injury (right). Blue = necrotic area; orange = viable stunted cells.
