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Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

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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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The FDA recognizes 118 routes of administration.

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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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The human body produces and destroys 15 million blood cells every second.

Salt marsh channels shown in cross section. Salt marsh channels shown in cross section.
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Anatomy of the Spinal Cord: Cross Section Through the Spinal Cord in the Cervical Region Anatomy of the Spinal Cord: Cross Section Through the Spinal Cord in the Cervical Region
Video: Embryonic development - Week 3

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