a. True b. False
Ask unlimited questions for free
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
The familiar sounds of your heart are made by the heart's valves as they open and close.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Your heart beats over 36 million times a year.
For a complete list of videos, visit our video library