Blood cells carry a deep evolutionary history. A new analysis suggests their earliest ancestors were macrophage-like cells inherited from single-celled life.

Macrophages have some startling similarities to amoebae. (RUSLANAS BARANAUSKAS/Science Photo Library/Getty Images) You probably don't think much about the blood running through your veins on a daily ...

Almost all animal species—including humans—have blood cells, but between different species our blood tells different stories.

The human blood system is in a constant state of turnover. First-line immune defenders, like neutrophils, need to be replaced after just four to eight hours, platelets can last a week, red blood cells ...

Your blood cells work tirelessly to keep you alive, carrying oxygen throughout your body and fighting off infections. But hidden in your daily meals are foods that can silently compromise these vital ...

Human bodies make 2 million red blood cells per second. They each live for 120 days and spend that time zooming completely around the body every 20 seconds, carrying oxygen from the lungs to other ...

A new study from Kyoto University in Japan has revealed that the blood pumping ...

White blood cells called neutrophils act as factories for C4A, linking peripheral immunity to schizophrenia and synaptic ...

Immature ganulocytes, also called myeloblasts, are a type of young white blood cell. Unusual amounts of myeloblasts usually occur due to problems with bone marrow, such as certain types of blood ...