| 21. | Remember there are a lot of blood vessels on the larynx.
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| 22. | Scientists once thought migraines were caused by abnormally dilated blood vessels.
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| 23. | Damage to the blood vessel lining or endothelium is particularly important.
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| 24. | Some strokes are caused by burst blood vessels in the brain.
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| 25. | It can also show the blood flow within the blood vessels.
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| 26. | These cells enter the blood vessels and travel across the body.
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| 27. | It proved to contain only a collection of minor blood vessels.
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| 28. | Tiny blood vessels bridge the spongy brain to the hard skull.
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| 29. | The culprit is a protein in the walls of blood vessels.
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| 30. | The compromised blood flow often causes collateral blood vessels to form.
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