On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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There are 60,000 miles of blood vessels in every adult human.
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The average adult has about 21 square feet of skin.
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The human body produces and destroys 15 million blood cells every second.
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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.
Primary production is constrained by the most limiting factor.
El Niño and areas of high marine primary production around the Galapagos Islands. Noti