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Did you know?

There are 60,000 miles of blood vessels in every adult human.

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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

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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.

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In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Summation of Heart Sounds, Loud S1 Summation of Heart Sounds, Loud S1
Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th
Right Sided Heart Failure Right Sided Heart Failure
Circadian Rhythms in the SCN Circadian Rhythms in the SCN
Heart valves in closed position viewed from the top. Heart valves in closed position viewed from the top.
Vessels of the heart: Posterior Vessels of the heart: Posterior
Video: Ultrasound of a Fetus (Sonogram)

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