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Did you know?

There are more bacteria in your mouth than there are people in the world.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

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.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Viruses must infect a host cell to grow and reproduce Viruses must infect a host cell to grow and reproduce
The basic unit of life - cell The basic unit of life - cell
The process of ventilation: inspiration and expiration. The process of ventilation: inspiration and expiration.
Scientific process and the scientific method Scientific process and the scientific method
PV cells have potential for domestic and commercial use PV cells have potential for domestic and commercial use
Growth of cultured cells from patients with xeroderma pigmentosum (XP) Growth of cultured cells from patients with xeroderma pigmentosum (XP)
Video: HIV Infection: Viral life cycle

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