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Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

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.

General structure of an animal cell General structure of an animal cell
The general pattern of progression of an untreated HIV infection The general pattern of progression of an untreated HIV infection
Compression Occurs in vertebrae subjected to extreme stresses, as when one falls and lands on his or Compression Occurs in vertebrae subjected to extreme stresses, as when one falls and lands on his or
Risk for falls cont'd Risk for falls cont'd
Two general classes of symmetry Two general classes of symmetry
General mechanism of egg formation in animals General mechanism of egg formation in animals
Video: Cerebral Cortex Animation

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