Question

What is a clinical thermometer ? State its special feature. Draw a labelled neat diagram of a clinical thermometer showing the range of temperature marked on it.

Answer 1

Doctors use a special thermometer called the clinical thermometer for measuring the temperature of the patient's body. This thermometer has the markings from ${35}^{\circ }C$ to ${42}^{\circ }C.$ It has a slight bend or kink in the stem above the bulb. This kink is called the constriction. This constriction prevents the mercury from falling back all by itself. The temperature of a healthy person is ${37}^{\circ }C.$ This temperature is marked by a red arrow.