A blood test is a laboratory analysis performed on a blood sample that is usually extracted from a vein in the arm using a hypodermic needle , or via fingerprick . Multiple tests for specific blood components, such as a glucose test or a cholesterol test , are often grouped together into one test panel called a blood panel or blood work . Blood tests are often used in health care to determine physiological and biochemical states, such as disease , mineral content, pharmaceutical drug effectiveness, and organ function. Typical clinical blood panels include a basic metabolic panel or a complete blood count . Blood tests are also used in drug tests to detect drug abuse. In some of the United States, a blood test is required before marriage.
I was disappointed with the book. It contained numerous grammatical errors throughout the book, and it was a paperback book of only 97 pages. It did contain many facts, but nothing new that I haven't already read in many other health books. I felt that the book was very overpriced for being $47. There were no meal plans or recipes, like I find in other health books. Other health books that I have purchased were much cheaper in price, and had much more quality, were without grammatical errors, and had three times the information in a hard back cover. On top of the high price of the book, I had to pay an additional costly shipping charge, whereas other books that I have ordered were shipped for free. I felt it was not a good deal, and not worth the amount that I had to pay.