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Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

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Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Examples of the most common X-ray positions and the images they produce. Examples of the most common X-ray positions and the images they produce.
Examples of the most common X-ray positions and the images they produce. Examples of the most common X-ray positions and the images they produce.
The metabolic activity of mammalian cells The metabolic activity of mammalian cells
Perception Activity Perception Activity
DNA polymerase proofreading activity DNA polymerase proofreading activity
DNA sequencing reactions DNA sequencing reactions
Video: Phases of the ovarian cycle

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