trachea

The researchers discovered high levels of virus in the animals' nasal passages, trachea and lungs and moderate-to-low virus levels in other organs, consistent with H5N1 infections found in other mammals.

Charles Darwin famously remarked on the ridiculousness of the fact that "every particle of food and drink we swallow has to pass over the orifice of the trachea with some risk of falling into the lungs."

Even the foremost pioneer of evolutionary biology, Charles Darwin, famously remarked on the ridiculousness of the fact that "every particle of food and drink we swallow has to pass over the orifice of the trachea with some risk of falling into the lungs."

They are called noninvasive because they don’t require trachea surgery to open the airway, like ones used in hospitals.

The larynx functions like an antechamber to the windpipe, or trachea, with a flap of tissue called the epiglottis keeping food and drink from falling down the windpipe.