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Did you know?

Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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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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Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

Prokaryotic cell structure Prokaryotic cell structure
Exon–intron structure of the ovalbumin gene in chickens Exon–intron structure of the ovalbumin gene in chickens
First-order sensory neuron with free nerve endings First-order sensory neuron with free nerve endings
Overall structure of section of macula Overall structure of section of macula
Ribosome structure and tRNA-binding sites interpreted from cryo-EM–generated data Ribosome structure and tRNA-binding sites interpreted from cryo-EM–generated data
Structure of a chromosome Structure of a chromosome
Video: Acid-base imbalances - respiratory acidosis and alkalosis

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