Diaphragm - Dome shaped muscle used during breathing, Air Pressure - The force due to gases acting on an area, Alveoli - Small air sacs in the lungs where gas exchange occurs, Asthma - Condition which makes breathing difficult, Bronchi - Major air tubes in the lungs, Bronchioles - Small, branching tubules which come after the bronchi, Exhale - Breathe air out, Gas Exchange - Oxygen passes into the bloodstream and carbon dioxide passes from the tissues into the blood, Inhale - To breathe air in, Intercostal muscles - Muscles between the ribs which help the ribs to move, Trachea - The tube between the mouth and the lungs, Ventilation - Breathing in and out,

Breathing

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