Respiratory system

• breathing is a physical process that involves the movement of the diaphragm and intercostal muscles to create changes in air pressure in the lungs
• gas exchange is a physical process that involves moving gases (oxygen and carbon dioxide) into and out of cells by diffusion
• respiration is a chemical process that involves using oxygen to break down glucose into energy in the form of ATP
• nose/nasal passage: filters bacteria and provides a passageway for air to enter the lungs
• mouth: the opening of the digestive system that allows food to enter the body
• larynx: the structure that connects the trachea to the pharynx; vocal chords
• pharynx: where the nasal passage and mouth connect
• trachea: tube with cartilage rings for support and stability
• bronchi: smaller tubes that divert air into the left/right lungs
• bronchioles: branching of bronchi, smaller airways that lead to alveoli
• alveoli: site of gas exchange in lungs