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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
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Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.
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Everyone has one nostril that is larger than the other.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
![Filter in the vena cava prevents an embolus from traveling to the heart, lungs, or brain; A, Greenfi](https://biology-forums.com/gallery/47/medium_18099_24_10_12_3_18_58.jpeg)
![Note the discovery as the air filter housing was opened during service on a Pontiac Bonneville. The ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_2_42_23_29619489.png)