How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Who studied digestion through a hole in a man's stomach?
“Doctor William Beaumont studied digestion through a permanent hole in patient Alexis St. Martin's stomach in the 1820s.”
Reference: Smithsonian Magazine
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How long is the small intestine?
The small intestine is about 20 feet long.
When to not have grapefruit
If you've had an organ transplant, it is best to avoid eating grapefruit or drinking grapefruit juice (it interferes with the anti-rejection drugs in your blood).