Helps regulate acid-base balance through the bicarbonate buffer system.
It takes up oxygen for transport in the blood to the cells.
It captures oxygen in the hemoglobin molecule and releases it to the cells.
It circulates hormones and other chemicals from sites of manufacture to target organs.
It expels carbon dioxide waste from the cellular metabolism.
The scalene muscles
The rectus abdominus
The thyroid cartilage
In the trachea
In the pleural cavity
In the bronchial cilia
In the alveoli
Expiration is pushing air out of the lungs.
Expiration also means "to die."
Alveolar capillary air exchange is an example of pulmonary respiration.
Inspiration is taking air into the lungs
The bronchioles and alveoli perform pulmonary respiration, which is the exchange of gases.
Cilia in the lining of the cells of the upper airway beat toward the mouth to remove small foreign material.
Loss of cilia does double harm to smokers, because secretions cannot be cleared and carcinogens stay in contact with the lining cells longer.
Lung cancer has a low fatality rate is is easily preventable.
A foreign body impacted here may be rapidly fatal; it is hard to gain emergency access.