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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.
In 1864, the first barbiturate (barbituric acid) was synthesized.
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.