Trachea
The trachea begins immediately below the larynx (voicebox) and runs down
the center of the front part of the neck ends behind the upper part of the
sternum. Here it divides to form two branches which enter the lung
cavities. The trachea (windpipe) forms the trunk of an upside-down tree
and is flexible, like a vacuum tube, so that the head and neck may twist
and bend during the process of breathing.
The trachea, or windpipe, is made up of fibrous and elastic tissues and
smooth muscle with about twenty rings of cartilage, which help keep the
trachea open during extreme movement of the neck. The lining includes
cells that secrete mucus along with other cells that bear very small
hairlike fringes. This mucus traps tiny particles of debris, and the
beating of the fringes moves the mucus up and out of the respiratory
tract, keeping the lungs and air passages free.
In Russian folk medicine, there is the thought that rubbing the chest
with pork fat will cure a cold. Mustard plasters and boiled snails in
barley water were thought to be effective by others, and nobody knows what
the ingredients were for early "cure-all tonics" and "snake oil" kits. It
is now believed that the best medicine is to rest, keep warm, drink plenty
of fluids, and eat good, digestible meals. Sounds good to me...and
certainly better smelling.