A blood test is a laboratory analysis performed on a blood sample that is usually extracted from a vein in the arm using a needle, or via fingerprick. Blood tests are used to determine physiological and biochemical states, such as disease, mineral content, drug effectiveness, and organ function. They are also used in drug tests.
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Famous quotes containing the words blood and/or test:
“Oh, God! that bread should be so dear,
And flesh and blood so cheap!”
—Thomas Hood (1799–1845)
“The test is always how we treat the poor.”
—Robert Frost (1874–1963)
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