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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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.
Anfinsen's experiments with ribonuclease demonstrating that the primary structure of a polypept
Morphology of Primary Lesions
The Primary Visual Pathway
Levels of protein structure: Primary structure
Primary causes of chronic liver disease in the United States.
Human of the planet's net primary production and appropriation of NPP