Sentences with phrase «microscopic traces of blood»
For instance, the fecal occult blood test is an at - home kit that looks for evidence of microscopic traces of blood in stool samples, a potential sign of cancer.
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An autopsy can trace the path of a bullet through a body, or reveal microscopic damage to blood vessels in the brain, or identify a lethal clog in an artery.
New diagnostic techniques revealed traces of blood (inset, in blue) in microscopic samples from ancient African artifacts such as this one.