Once Upon a Time... (Hello Maestro)'s video: Once Upon a Time Life - Breathing

Peter and Pierrette go on a jogging tour with two friends in the park. They become acquainted with two pulmonary alveoli who are having a conversation about the young runners. Topic: the breathing. Some dust particles and microbes are lurking around with the aim of getting inside the body with the air that’s breathed in to cause some trouble there. The sentries are already alert though. The nose and also the mouth and throat catch the dust, clean the air and keep everything dangerous outside. Every day a new episode -- It's here: http://bit.ly/147hvgz SUBSCRIBE! The official channel of all "Once upon a time..." series! Follow the adventures of Maestro, the famous character with the long white beard who will introduce you to Man, Space, Life, The Americas, The Discoverers, The Explorers, Our Earth, and Solar Impulse...