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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.