Cyanide works by making the human body unable to use oxygen.
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The human body produces and destroys 15 million blood cells every second.
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Thyroid conditions may make getting pregnant impossible.
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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
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There are more sensory neurons in the tongue than in any other part of the body.
This bleeding heart plant (the genus Dicentra) is an example of an angiosperm.
The lymphatic system. Lymphatic vessels, major lymph nodes, and lymphatic organs. The direction of l
Anatomy of the heart
Diagram of the heart showing normal conduction pathway.