Across the Atlantic, bloodletting was used in Mesoamerica by Maya priests and rulers, who pierced the tongue, lips, and other body parts and offered their blood as a sacrifice to the gods. The blood loss …

A few centuries later the humours still dominated theories of medicine, but the origin of an ailment was more likely than not to be diagnosed as an excess of one humour in particular: blood. Though …

6 days ago · Blood is a fluid that transports oxygen and nutrients to cells and carries away carbon dioxide and other waste products. It contains specialized cells that serve particular functions. These …

Bloodletting grew in popularity in the 2nd century ce, when Galen, the dominant medical voice in Rome, determined that blood was the most important humor. He advocated leeching, the extraction of blood …

Blood picks up oxygen from the lungs and nutrients from the gastrointestinal tract and carries them to cells throughout the body for metabolism. It picks up carbon dioxide and other wastes from those …

Generally, the blood eagle is tied to vengeance, especially between nobles. In all four accounts of the ritual killing in Norse literature, it is used to avenge the killing of a family member.

6 days ago · There are four major types of blood cells: red blood cells (erythrocytes), platelets (thrombocytes), lymphocytes, and phagocytic cells. Collectively, the lymphocytes and phagocytic …

Blood diamond, as defined by the United Nations (UN), any diamond that is mined in areas controlled by forces opposed to the legitimate, internationally recognized government of a country and that is sold …

If you have an AA or AO genotype, you will have the phenotype of type A blood; if you have a BB or BO genotype, you will have a type B blood phenotype; if you have an AB genotype, you will have a type …

Bone marrow was recognized as the site of blood-cell formation in the 19th century, along with the first clinical descriptions of pernicious anemia, leukemia, and a number of other disorders of the blood.