Red blood cells are important mediators of the innate immune system. Depending on the cellular environment, these cells either activate the immune system or maintain the system in a dormant state. In ...

Every two seconds someone in the U.S. needs a blood transfusion, according to the American Red Cross. “Blood transfusion is a highly critical, life-saving clinical procedure for a variety of patients, ...

Capillaries are very tiny blood vessels — so small that a single red blood cell can barely fit through them. They help to connect your arteries and veins in addition to facilitating the exchange of ...

Beetroot is packed with nitrates that may help promote blood circulation, which could help keep hands and feet warm during ...

During my training as a hematologist at U.C.L.A., forty years ago, a senior faculty member introduced the program of study by citing a verse from Leviticus: “The life of the flesh is in the blood.” ...