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.
Keywords: measurement. The smallest unit of distance that we can actually measure is an Angstrom â this is 10 million times smaller than a millimetre. There are even smaller units than this, a femtometer (also known as a fermi) is 100,000 times smaller, and is about the size of an atomic nucleus. Of course, distance is not the only unit of measurement. It is thought that a unit known as Planck time is the smallest measurement of time that will be possible.