1.
It is very important because it is used to breath, to the gas Exchange.
2.
is a flap that is made of elastic cartilage tissue covered with a mucous membrane, attached to the entrance of the larynx.
The function of the epiglottis is to prevent food and drink from going down the airway to prevent shocking.
3.
You can live with only one lung if the surgery is completed properly and correctly. Someone can lose a lung as from an injury or cancer. It would take some amendment, but a person can continue to exist with just one lung.
Bronchitis
Atelectasis - collapse of part and sometimes all (less common) of the lung
Asthma
6.
is a tube that connects the pharynx and larynx to the lungs, allowing the passage of air.
8