Question

Why thermometer is kept under tongue before use

Answer 1

Thermometer is kept under tongue so that the reading which it gives is true , i.e. true reading of the inner body heat. The intense heat of our body is presentunder our tongue and so it is usedunder tongue so that we can measure our whole body temperature 

Answer 2

Thermometer is kept under tongue so that the reading which it gives is true , i.e. true reading of the inner body heat. The intense heat of our body is present under our tongue and so it is used under tongue so that we can measure our whole body temperature . ... So it is kept under tongue.

Answer 3

Thermometer is kept under tongue so that the reading which it gives is true , i.e. true reading of the inner body heat. The intense heat of our body is present under our tongue and so it is used under tongue so that we can measure our whole body temperature . ... So it is kept under tongue.