Lungs 101

lungs  Your lungs contain tiny air sacs called alveoli Blood flows through the walls of the air sacs and picks up oxygen from the air in the sacs At the same time, Bronchioles and alveoli in the lungs In your lungs, the main airways, called bronchi, branch off into smaller and smaller passageways The smallest airways,

lungs to expand, or grow bigger, to let air in, space must be made inside your chest Your diaphragm is a large muscle below your lungs When you inhale An animation showing how the lungs work and what they do

The main organ of the respiratory system is the lungs Other respiratory organs include the nose, the trachea and the breathing muscles (the diaphragm and the Your lungs contain tiny air sacs called alveoli Blood flows through the walls of the air sacs and picks up oxygen from the air in the sacs At the same time,