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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.
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.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
The average adult has about 21 square feet of skin.
For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.