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Did you know?

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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

The internal organization of cells, tissues, organs, and organ systems in a mammal. The internal organization of cells, tissues, organs, and organ systems in a mammal.
Position of the lungs within the thoracic cavity; anterior view illustrating regions of the lungs an Position of the lungs within the thoracic cavity; anterior view illustrating regions of the lungs an
The respiratory system. (a) Sagittal section of the head and neck, revealing the organs of the upper The respiratory system. (a) Sagittal section of the head and neck, revealing the organs of the upper
Mice Organs Mice Organs
Jellyfish organs Jellyfish organs
Golgi Tendon Organs. Golgi Tendon Organs.
Video: ADH and the arterioles, kidneys, sweat glands and the Atrial natriuretic peptide (ANP)

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