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The horizontal fraction bar was introduced by the Arabs.

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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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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Pulse points. Pulse points.
Effect of a Black Hole’s Tidal Force on Infalling Matter Effect of a Black Hole’s Tidal Force on Infalling Matter
Mechanism of Muscular Contraction Mechanism of Muscular Contraction
The signal voltage from a throttle position increases as the throttle is opened because the wiper ... The signal voltage from a throttle position increases as the throttle is opened because the wiper ...
The piston creates a tumbling force as it moves upward. The piston creates a tumbling force as it moves upward.
The injector on-time is called the pulse width. The injector on-time is called the pulse width.
Video: Genetic distance between human groups

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