Thoracic wall layers include skin, subcutaneous tissue,
intercostal muscles, and ribs. These structures protect
vital organs and allow chest movements required for
breathing.
The three bronchial states show a healthy bronchus, one with
bronchitis, and another with asthma. Each one presents inflammation,
mucus, or constriction, affecting airflow and constriction in the airways.
Vocal cords in whisper: the position where they approximate
without full vibration, allowing airflow and producing a soft,
low sound without the intensity of normal phonation.