Trachea - The structure that carries air from the mouth and nose to the lungs, Bronchi - Two tubes which carry air to the lungs, Bronchioles - Small tubes in the lung, Alveoli - Small air sacs found at the end of bronchiole, Diaphragm - A sheet of muscle found underneath the lungs, Inhalation - The process of breathing in, Exhalation - The process of breathing out, Ribcage - A muscle and bone structure that surrounds the lungs, Aerobic Respiration  - The biological process that requires oxygen to happen, Asthma - A breathing condition that makes breathing very difficult,

Leaderboard

Visual style

Options

Switch template

Continue editing: ?