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Did you know?
The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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There are more bacteria in your mouth than there are people in the world.
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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.
![The underside of a male (top) and a female (bottom) individual of Pachygrapsus marmoratus, showing t](https://biology-forums.com/gallery/47/medium_27599_22_04_12_7_25_59.png)
![Physiological effects of the accumulation of lactose in the intestines of a lactose-intolerant indiv](https://biology-forums.com/gallery/47/medium_274247_21_01_15_7_40_16_20282429.jpeg)