A microfluidic device separates bacteria and immune cells from red blood cells.

Having a virtual copy of a patient's blood in a computer would be a boon to researchers and doctors. They could examine a simulated heart attack caused by blood clotting in a diseased coronary artery and see if a drug like aspirin would be effective in reducing the size of ...

Image Credit: © South Tyrol Museum of ArchaeologyResearch of wounds on a 5,300-year-old body found frozen in the Italian Alps in 1991 has produced the oldest red blood cells ever identified, and suggests the well preserved “Iceman” did not immediately die from his injuries, nor did he live for a ...

Blood found in Otzi the Iceman's wounds.

To resolve controversy over how much vitamin D is enough to protect older adults' health, researchers tested Cardiovascular Health Study blood samples. They sought links between each person's 25 (OH) D and first heart attack, cancer diagnosis, hip fracture or death. Risks rose when levels fell below 20ng/mL or 50 ...

The cells that coat the pipes leading to the heart cling more tightly together in areas of fast-flowing blood. The discovery could help to reduce vascular leakage and better treat heart disease.

Scientists have identified what could be a biological tipping point in the development of high blood pressure, in a discovery that could one day lead to new treatment.

Omega-3 fatty acid supplements have well-established healthy effects on the heart. But a study suggests these heart-healthy effects don’t include improving diastolic function, the ability of the heart to relax and efficiently fill with blood.

Citing the lack of clear guidelines for ordering blood transfusions during surgery, researchers say a new study confirms there is still wide variation in the use of transfusions and frequent use of transfused blood in patients who don’t need it.

A lot of people were skeptical when two young California-based researchers set out more than a decade ago to create a completely human-derived alternative to the synthetic blood vessels commonly used in dialysis patients. Since then, they've done that and more.

Scientists have developed nano-devices that successfully cross the brain-blood barrier and deliver a drug that tames brain-damaging inflammation in rabbits with cerebral palsy.

'Brain freeze' is a nearly universal experience -- almost everyone has felt the near-instantaneous headache brought on by a bite of ice cream or slurp of ice-cold soda on the upper palate. However, scientists are still at a loss to explain this phenomenon. Since migraine sufferers are more likely to ...