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The body's defense against dust etc starts in the nose. The main function of nose hair is to protect against airborne particles. These hairs are coated in sticky mucous which collect dust. The nose also warms and moistens the aiir we inhale.
Dust that gets past the nose has to pass the pharynx, larynx, enter the trachea before it can get to the lungs. However this part of the respiratory tract is also lined with mucous producing cells. The trachea is lined with hairlike cells called cilia, which waft the mucous, and any particles stuck to it upwards along the "mucociliary escalator" back up to the larynx wehere it is either coughed up or swallowed.
The cough reflex is another important mechanism to protect against foreign particles. Nerve endings in the larynx, trachea and bronchi are sensitive to irriatation, this sends impulses along the vagus nerve to the brains' respiratory centre in the brain stem, which causes the cough.
Waugh A and Grant A (2006) Ross and Wilson Anatomy and Physiology in Health and Illness, Edinburgh, Churchill Livingstone
What else can I help you with?
What cells form an army to defend your body against harmful bacteria?
white blood cell.
What ability of the body to defend itself against disease and other harmful substances?
It is the body's immune system.
What is the difference between Medal of Honor airborne and Medal of Honor vanguard?
On Airborne you play as a guy name Boyd Travers who's in the 82 airborne division. On vanguard you play as a European soldier in the resistance and you have to defend Europe from the Nazis
Can shakeology defend against cancer?
There is no scientific evidence or claim that Shakeology can defend against cancer.
Which is true of Japanese kamikaze pilots?
Their attacks were hard to defend against
What Preposition goes after defend?
The preposition "against" typically follows the verb "defend." For example, "She defended herself against the accusations."
What two organ systems that defend the body against infection are?
what two organ stysems that defend the body against infection are
How does exercise help prevent harmful stress?
The stress response is basically the body's way of preparing to defend against some kind of external danger. The chemistry of the body changes to prepare it for action, like increased heart rate, increased respiration. If a person experiences stress, as in harmful stress, it doesn't know what to do with the excess energy. So exercise helps to burn it off so it doesn't have negative effects on the body.
Are rough men standing ready to defend against potential threats?
Yes, rough men are prepared to defend against potential threats.
Does a porcupine have quills?
A porcupine has quills to defend themselves against harm's way (defend them from predators).
How to Defend against siege towers?
By being a boss
Why do zebras have hoofs?
To defend themselves against predators.
