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.
Quick Answer. The SI base unit for distance is the meter, according to the International System of Units. From this base unit, using a system of equations, a number of derived quantities are obtained, such as area, volume, speed and acceleration.