| 1 | He cut his finger deep and the blood flowed out. | |
| 2 | The brain needs oxygenation to function and this comes from the blood flow. | |
| 3 | This blocks the flow of blood to the brain and other organs, and causes anaemia, respiratory problems and brain dysfunction. | |
| 4 | Tea has complex compounds called polyphenols which are believed to help the arteries to relax or dilate, thus enabling a smoother flow of blood. | |
| 5 | These nano-sized sensors would float around the bloodstream until they ran into some toxic chemical or disease-causing germ. |
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