Blood test

A blood test, also known as bloodwork, is a laboratory analysis performed on a blood sample. The sample is usually taken from a vein in the arm using a needle, or from a finger. Blood tests[1] are used to determine physiological and biochemical states, such as disease, mineral content, drug effectiveness, and organ function. They are also used to test for certain illegal drugs.

A venipuncture performed using a vacutainer

References
  1. "Blood Panel". Archived from the original on 2015-10-18. Retrieved 2013-10-28. {{cite web}}: More than one of |archivedate= and |archive-date= specified (help); More than one of |archiveurl= and |archive-url= specified (help)


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