It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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By definition, when a medication is administered intravenously, its bioavailability is 100%.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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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.
The vertebrate vestibular system.
The cardiovascular system. A schematic view of the closed circulation of blood. The heart is section
Procedures and Diagnostic Tests Related to the Integumentary System