Question

a narrow constriction is made near the bulb of the clinical thermometer why?​

Answer 1

Answer:

The constriction in the thermometer is to prevent the mercury from dropping back to the bulb when the reading is being taken. It is easier for us to take reading. It prevents the thermometric substance (Mercury or Alcohol) from running back into the bulb.

Explanation:

Answer 2

When a clinical thermometer is removed from the patient's body, a small constriction is formed around the bulb to stop the mercury from flowing back into the bulb.

• The mercury inside the bulb of a clinical thermometer expands as it is injected into the body, rising up the capillary tube. The restriction serves as a barrier, preventing the mercury from returning to the bulb as a result of the glass's capillary action. By doing this, you can be confident that the thermometer displays the greatest temperature that was recorded when taking the reading.
• Without the constriction, the mercury can flow back into the bulb and produce an incorrect reading. This might lead to misdiagnoses and misguided therapies. As a result, the clinical thermometer's small constriction is a crucial component that ensures their accuracy and reliability.

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