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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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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

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Illicit drug use costs the United States approximately $181 billion every year.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Tympanic membrane. Tympanic membrane.
Measuring Temperature Using a Tympanic Membrane (Aural) Thermometer Measuring Temperature Using a Tympanic Membrane (Aural) Thermometer
Baseline Pulse, Respiration, and Blood Pressure Values from Birth to Adolescence Baseline Pulse, Respiration, and Blood Pressure Values from Birth to Adolescence
5-4 The relationship between vapor pressure and temperature—in this case for water. As the ... 5-4 The relationship between vapor pressure and temperature—in this case for water. As the ...
The chemical structure of the water molecule facilitates life The chemical structure of the water molecule facilitates life
Shallow-water systems are highly productive Shallow-water systems are highly productive
Video: Mechanism of enzyme action

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