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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.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.