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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
![Inline four-cylinder engine showing principal and nonprincipal ends. Normal direction of rotation is ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_02_50_2932579.png)
![Record the first puff and this final reading for each cylinder. The final readings should all be ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_21_59_29705450.png)