^Mistake-proofing or Poka-yoke in the human body. Yes - as with
most things, nature did it first.
Coughing is a natural reaction that prevents the error of
foreign bodies from entering into the lungs. The sensitive wall
linings of the respiratory tract detect and eject minute
particles through coughing.
Veins have valves that are designed to prevent the error of
back-flow of blood as it travels through the system. They also
allow some blood to collect within the system without busting as
they have a larger internal diameter
Arteries have thick walls that can withstand the high pressure
that blood from the heart exerts on the circulatory system
Tearing is a necessary reaction to the entry of foreign bodies
into the eye
Mucus membrane traps bacteria and prevents the error of
pathogens entering the system
The skin is the first defence against entry of foreign bodies
and the oils and enzymes prevent harmful bacteria into the human
body
Inflammation reaction of swelling happens when blood vessels
leak fluid into the tissues. The chemicals attract white blood
cells (phagocytes) that eat germs and dead/ damaged cells. This
reaction prevents the spread of harmful toxins and pathogens to
the rest of the human body and is a form of natural
error-proofing^
