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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.
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.
There are 20 feet of blood vessels in each square inch of human skin.
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
![A rocky shore at low tide, showing the great abundance that can be attained by populations of intert](https://biology-forums.com/gallery/47/medium_33_28_08_11_12_16_04_1593395.jpeg)
![A photograph of a woman with exophthalmos. This condition is associated with hypersecretion of the t](https://biology-forums.com/gallery/47/medium_14755_28_08_12_1_43_57_824167.jpeg)