00:02
So to conclude our topic
on the respiratory system,
we will call
that the respiratory system
begins at the nasal cavity
and ends at the alveoli.
00:13
It has two main zones
the conducting zone
where air is being conducted
and the respiration zone
where respiration
is going to occur.
00:24
The main function of
the respiratory system
is to exchange gases
between the blood
and the lungs.
00:31
This occurs in concert
with the circulatory system
that exchanges gases
between the blood
and the tissues.
00:39
So the respiratory system
is more responsible
for external respiration
while the circulatory
system is more responsible
for internal respiration.
00:53
Pulmonary ventilation
is going to rely on
several different pressures
that happened between
the outside of the body
and the inside of
the thoracic cavity.
01:04
The movement of gases in and out
of the thoracic cavity
is going to be influenced
by Boyle's Law.
01:15
Gas exchange relies
on the partial pressures
of gas molecules
in between the
alveoli and the blood.
01:23
As well as between the
blood and the tissue.
01:27
The principles of Dalton's
law and Henry's law
of partial pressures
are applied in order
to understand how
gases move in and out
of the alveoli and the
blood and the tissues.
01:42
Most oxygen in the body
is going to be carried
in the blood by
way of hemoglobin.
01:48
Also carbon dioxide can also
be carried on hemoglobin.
01:53
But most of our carbon
dioxide is going to be carried
by way of bicarbonate atoms.
02:00
And finally,
respiration is going to be controlled
by our higher brain centers
are chemoreceptors
found in the brain stem
as well as in the
carotid and aortic bodies
and finally by reflexes
such as the inflation reflex
or reflections in response
to chemical irritants.
02:23
And this concludes our lecture
or our topic
on the respiratory system.
02:29
Thank you for listening.
The lecture Respiratory System: In a Nutshell (Nursing) by Jasmine Clark, PhD is from the course Respiratory System – Physiology (Nursing).
What are the 2 main zones of the respiratory system? Select all that apply.
What carries most carbon dioxide in the blood?
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