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There are 60,000 miles of blood vessels in every adult human.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Gram-positive and Gram-negative bacteria. Gram-positive and Gram-negative bacteria.
negative feedback mechanism negative feedback mechanism
Gram Postive & Gram Negative Bacteria Gram Postive & Gram Negative Bacteria
Nonverbal communications convey strong, powerful messages that may be negative or positive. Nonverbal communications convey strong, powerful messages that may be negative or positive.
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
Using Reinforcement Instead of Punishment Using Reinforcement Instead of Punishment
Video: Heart sounds

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