the eustachian tube
Epligottis Opens A Flap of Tissue and Covers the Lung and makes it go through the Stomach. Your Welcome :3
if they have water or food than has been in contact with it then they may get infected
pure air
The blood entering from the lungs has a high oxygen content and the blood entering from the body is high in carbon dioxide.
mucous membranes, cilia
alveolar fluid
This stops air from entering the chest cavity, and prevents collapsing the lung.
The lung will collapse (atelectasis) because the negative intrapleural pressure gradient that keeps the lung inflated has is now at equilibrium with atmospheric pressure.
Yes it can
No
Prevent air from entering the potential space in the pariatal lining and collapsing the lung.
a teaspoon of water