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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.
Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
![Sublingual medication administration. Photograph of a male patient placing a nitroglycerine tablet u](https://biology-forums.com/gallery/47/medium_14755_27_08_12_12_14_17_81762125.jpeg)
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