Ask unlimited questions for free
Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Vaccines prevent between 2.5 and 4 million deaths every year.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
For a complete list of videos, visit our video library