Every day, hospitals throughout the U.S. transfuse blood or blood components, such as platelets, to save the lives of people who are in car crashes, and victims of fires and other emergencies.

Chicago researchers have found a link between long COVID and eye health. A new study from Northwestern Medicine is giving ...

The same mechanisms involved in COVID-related cardiovascular events are responsible for COVID-related myocarditis.

a protective layer of cells lining the inner surface of blood vessels. These cells form a membrane that usually keeps toxins out of the brain while allowing oxygen and nutrients to get in.

The uvea is made up of a layer of blood vessels, a muscular ring that surrounds your pupil, and the iris, the colored part of your eye. Together, they help your eyes focus so you can clearly see ...

You can get an aneurysm in any blood vessel, but they are most common in the brain’s ... The walls of arteries are made of three layers: an inner lining of cells, a middle layer of muscle and elastic ...