Breathing is then done through the tube, bypassing the mouth, nose, and throat. A tracheostomy is commonly referred to as a stoma. This is the name for the hole in the neck that the tube passes through.
A millimeter (mm) is the smallest. In order from smallest to largest they rank millimeter, centimeter (cm), decimeter (dm), and meter (m). These are all common units of length in the metric system.
For example: 1  rulers and tape measures are marked in millimetres or centimetres to measure shorter lengths accurately. 2  a trundle wheel is used to measure length to the nearest metre. 3  a car's odometer often measures distance in tenths of a kilometre.ecall that the most common metric units of length used are the kilometre (km), the metre (m), the centimetre (cm) and the millimetre (mm). These units of length are related as follows: Note that we would measure the: