Explain why a clinical thermometer is exclusively used to measure the human body temperature and a laboratory thermometer is used to measure the temperatures of different substances but not to measure the human body temperature .

Explanation

The clinical thermometer is designed to measure the temperature of the human body only. The temperature of human body normally does not go below `35^@C` and above `42^@C`. It means that the range is from `35^@C` to `42^@C`. So, it is not used for measuring the temperature of any object other than human body.
Normal thermometer or laboratory thermometer is generally from `-10^@C` to `110^@C` and value of each small division is `1^@C`. Thus, small variations in body temperature cannot be measured accurately by using a laboratory thermometer. So, we cannot use this thermometer to find out the temperature of the human body.