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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
Asthma cases in Americans are about 75% higher today than they were in 1980.
As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
There are more nerve cells in one human brain than there are stars in the Milky Way.
![The appearance of different types of tissues-muscle, epithelial, nervous, connective-and their locat](https://biology-forums.com/gallery/47/medium_14755_16_09_12_5_52_12_87441522.jpeg)
![A typical fuel pulsator used mostly with roller vane-type pumps to help even out the pulsation in ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_11_10_59_2998273.png)