Blood is a body fluid in the circulatory system of humans and other vertebrates that delivers necessary substances such as nutrients and oxygen to the cells, and transports metabolic waste products away from those same cells.

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Immune genes are altered in Alzheimer’s patients’ blood: Viral infections or environmental factors could put person at risk for Alzheimer’s, scientists suggest

Immune genes are altered in Alzheimer's patients' blood

The Blood of Exceptionally Long-Lived People Reveals Key Differences

Caffeine in Your Blood Might Affect Body Fat And Diabetes Risk, Study Finds

Low-frequency ultrasound can improve oxygen saturation in blood

First-of-Its-Kind Procedure Uses Pig Liver to Filter Human's Blood

Blood’s Cryptic Code: How Inherited Genes Propel Rare Cancers

The Key to Creating Blood Stem Cells May Lie in Your Own Blood

People With Suicidal Thoughts Show a Chemical Pattern in Their Blood

Written in Blood: The Revealing Forensic “Tails” of Crime Scene Bloodstains

Swapping blood for spit -- for convenient at-home health monitoring

SpaceX rockets keep tearing blood-red 'atmospheric holes' in the sky, and scientists are concerned

Some picky Australian mosquitoes may target frog nostrils for blood

Blood clotting risk quickly drops after stopping hormonal contraceptives

Astro Lab Chronicles: Blood, Sweat, and Gears With Expedition 70

Red Alert: Earth’s Blood-Like Waters Revealed From Space

Drawing a tube of blood could assess ALS risk from environmental toxin exposure

Fruit, nectar, bugs and blood: How bat teeth and jaws evolved for a diverse dinnertime

Blood in the Machine review: Going back to the Luddites

The Blood of Exceptionally Long-Lived People Shows Key Differences