<http://schema.org/description>
"In a recently published study in the journal Experimental Physiology, Brazilian researchers have confirmed the importance of a specific group of neurons found in a region of the brain known as the retrotrapezoid nucleus (RTN) in detecting changes in carbon dioxide (CO2) levels and in modulating the activity of the neuronal groups that control respiratory activity."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2014-06-body-high-co2-blood.html>