Respiratory System—Anatomy of the Lungs
Lecture 5
Today, our lectures are going to take us into a new system, the
respiratory system. And we put it here because it has a very natural t
both anatomically and physiologically with the cardiovascular system.
T
he respiratory system
brings oxygen to
move carbon dioxide
from the blood so that the
heart can pump it out to
the rest of the body and to
© John Foxx/Stockbyte/Thinkstock.
all the cells. This lecture
examines the anatomy of
the respiratory system,
especially of the lungs. After
studying the integration of
the respiratory system with
the circulatory system, we The respiratory system under X-ray.
review the anatomy of the
structures through which air enters the body and passes into the lungs. Next,
we examine in detail the anatomy of the lungs themselves—their sections
and covering and the structures in which exchange of gases with the blood
takes place.
The respiratory system performs the following functions:
It takes up oxygen for transport in the blood to the cells.
It expels carbon dioxide waste from cellular metabolism.
It helps regulate acid-base balance through the bicarbonate buffer
system.
27
, Anatomy of the respiratory conducting system
The respiratory conducting system brings air to the respiratory
portion.
The respiratory and digestive systems are connected and share the
conducting system of the mouth and throat.
The mouth is a conducting system to the larynx. It moisturizes air.
The nose is a conducting system to the larynx. It moisturizes and
warms air and removes particulate debris.
The mouth and nose work together to provide backup volume and
redundant sources of air supply.
The nose is lined with mucous membranes that have folds called
turbinates or conchae. Turbinates provide extra surface area to
Lecture 5: Respiratory System—Anatomy of the Lungs
warm and moisturize air.
The mucous covering the turbinates is sticky and catches dirt and
other foreign elements, which are then swallowed or blown out.
The nasopharynx (pharynx means “gulf” or “throat”) has the same
functions as the nose, but it has a larger volume.
The oropharynx is the back of the mouth.
The epiglottis covers the trachea during swallowing.
The hypopharynx is the lowest part of the pharynx.
The larynx
The larynx is the “voice box”; it functions only to produce sound.
28
Lecture 5
Today, our lectures are going to take us into a new system, the
respiratory system. And we put it here because it has a very natural t
both anatomically and physiologically with the cardiovascular system.
T
he respiratory system
brings oxygen to
move carbon dioxide
from the blood so that the
heart can pump it out to
the rest of the body and to
© John Foxx/Stockbyte/Thinkstock.
all the cells. This lecture
examines the anatomy of
the respiratory system,
especially of the lungs. After
studying the integration of
the respiratory system with
the circulatory system, we The respiratory system under X-ray.
review the anatomy of the
structures through which air enters the body and passes into the lungs. Next,
we examine in detail the anatomy of the lungs themselves—their sections
and covering and the structures in which exchange of gases with the blood
takes place.
The respiratory system performs the following functions:
It takes up oxygen for transport in the blood to the cells.
It expels carbon dioxide waste from cellular metabolism.
It helps regulate acid-base balance through the bicarbonate buffer
system.
27
, Anatomy of the respiratory conducting system
The respiratory conducting system brings air to the respiratory
portion.
The respiratory and digestive systems are connected and share the
conducting system of the mouth and throat.
The mouth is a conducting system to the larynx. It moisturizes air.
The nose is a conducting system to the larynx. It moisturizes and
warms air and removes particulate debris.
The mouth and nose work together to provide backup volume and
redundant sources of air supply.
The nose is lined with mucous membranes that have folds called
turbinates or conchae. Turbinates provide extra surface area to
Lecture 5: Respiratory System—Anatomy of the Lungs
warm and moisturize air.
The mucous covering the turbinates is sticky and catches dirt and
other foreign elements, which are then swallowed or blown out.
The nasopharynx (pharynx means “gulf” or “throat”) has the same
functions as the nose, but it has a larger volume.
The oropharynx is the back of the mouth.
The epiglottis covers the trachea during swallowing.
The hypopharynx is the lowest part of the pharynx.
The larynx
The larynx is the “voice box”; it functions only to produce sound.
28
