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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Summary of events in the killing of virus-infected cells by cytotoxic T cells. Summary of events in the killing of virus-infected cells by cytotoxic T cells.
The north-facing slope at this site supports a Mediterranean woodland, while the vegetation on the s The north-facing slope at this site supports a Mediterranean woodland, while the vegetation on the s
Image was downloaded from the Jet Propulsion Laboratory web site Image was downloaded from the Jet Propulsion Laboratory web site
Night Attack on the Sanjo Palace (detail), from the Scrolls of Events of the Heiji Period. Night Attack on the Sanjo Palace (detail), from the Scrolls of Events of the Heiji Period.
Mechanical Events Mechanical Events
Bacteriophage site-specific recombination systems Bacteriophage site-specific recombination systems
Video: How Hemoglobin Picks Up and Delivers Oxygen

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