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

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

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There are more nerve cells in one human brain than there are stars in the Milky Way.

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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.

6 day old human embryo 6 day old human embryo
Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
The Oase I mandible, earliest modern human in Europe. The Oase I mandible, earliest modern human in Europe.
Selected biological, psychological, and sociological factors in the development of personality ... Selected biological, psychological, and sociological factors in the development of personality ...
Human embryo shortly after fertilization in the laboratory Human embryo shortly after fertilization in the laboratory
Human Development (Full Term) Human Development (Full Term)
Video: Atrophy

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