.:The Trachea:.
After the air exits the nasal cavity, it passes quickly through the pharynx. It makes
a stop at the epiglottis. The epiglottis directs the air to its correct pathway: The trachea. The trachea itself is a tubular structure with cartilage rings that support
the airway.
.:The Bronchi:.
After the trachea, the air wil quickly encounter structyres known as the Brochi. The bronchi are very similar in structural
comparison to the trachea. They are smaller cinsidering they are branches from the trachea. They deviate laterally into the
lungs where the air will continue its journey.
.:Bronchioles:.
Another iteration of branching creates the bronchioles. They are small and diffues the air into the lungs where it will be
absorbed into the blood stream.
Like the bronchi are deviations and similar to the trachea, the bronchioles are deviated form the bronchi and are sightly
similar in structure.
.:The Lungs:.
The lungs are the powerhouses. Their overall surface area is equal to that of a tennis court. They are sophisticated
machines that remove the oxygen from the air we breathe and diffuse it into our circulatory system.
In gross anatomy, the lunhs are palpably 'squishy' and slightly malleable, however they are able to fill back to normal size
when inflated. Comparing a lung to a balloon hardly captures the true complexity of these organs, but the inflation is very
similar. They are filled and emptied by the movement of the diapraghm.
The
mechanism that actually performs the gas exchange are structures known as Alveoli. They are sacs filled with capillaries that
allow oxygen to enter and carbon dioxide to leave. Little bundle of these sturctures completely fill the lungs.