HEAD RUSH

摘要

Blood tells a story about the body it inhabits. As it pumps through vessels, delivering nutrients and oxygen, the ruby red liquid picks up information. Hormones carried by blood can hint at how hungry a person is, or how scared, or how sleepy. Other messages in the blood can warn of heart disease or announce a pregnancy. Immune molecules can reveal an infection. When it comes to the brain, blood also seems to be more than a traveling storyteller. In some cases, the blood may be writing the script.