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Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

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The average office desk has 400 times more bacteria on it than a toilet.

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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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The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

The major muscles of the human body, anterior side. The major muscles of the human body, anterior side.
This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande This lithograph by Currier and Ives gives an erroneous impression of the “battle.” Major Robert Ande
Major Risk Factors for Hypertension Major Risk Factors for Hypertension
Control of Respiration Control of Respiration
A Sociological Timeline of Major Figures in the Development of Sociological Theory, 1820–1960 A Sociological Timeline of Major Figures in the Development of Sociological Theory, 1820–1960
Negative Feedback and Temperature Control Negative Feedback and Temperature Control
Video: Endocytosis -Types and Phagocytosis

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