human body, anatomy, respiratory system, breathe, breathing, mouth, nasal passage, trachea, windpipe, bronchi, bronchiolies, alveoli, lungs, diaphragm, nose

The Respiratory System
Picture from: A Look Inside the Human Body Designed by "Parenting the Next Generation" Send comments via feedback form
Respiratory system & ventilation  |  Gas exchange  |  Respiratory System (BrainPOP Movie)