| 1. | This results in backflow of blood into the pampiniform venous plexus.
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| 2. | The backflow of urine is prevented by valves known as ureterovesical valves.
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| 3. | At certain times of the year, the water backflows.
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| 4. | The semilunar valves close to prevent backflow into the heart.
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| 5. | Also sewage lifting stations provide comprehensive protection against sewer backflow.
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| 6. | As a result, there is a backflow of water into our houses.
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| 7. | To reduce the risk of contamination, a backflow preventer can be fitted.
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| 8. | Venous backflow increases vein diameter because of excessive pressure, and testosterone pooling.
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| 9. | This case there is a backflow in the chimney.
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| 10. | Serum urea and creatinine determinations may be necessary to rule out backflow kidney damage.
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