True about normal expiration
Your expiratory reserve volume is the amount of extra air -- above anormal breath -- exhaled during a forceful breath out. The average ERV volume is about 1100 mL in males and 800 mL in females Ref: guyton and hall textbook of medical physiology 12 edition page number:324,325,326
At the end of normal expiration air in lung is ERV
Chest wall has a tendency to move outward which is balanced by inward recoil of alveoli
In expiration pleural pressure is equal to alveolar pressure
Muscles that elevate the chest cage are classified as muscles of expiration
Respiratory system