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:
“What if I look upon a man
As though on my beloved,
And my blood be cold the while
And my heart unmoved?
Why should he think me cruel
Or that he is betrayed?”
—William Butler Yeats (1865–1939)
“Wild roses, at your back porch, break their blood,
And bud to test surprises of sea air,”
—Howard Moss (b. 1922)
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