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Respiratory System
Dr. Pooja Walia
Assistant Professor
Dept. of Education
Outline of the Presentation
• What is Respiratory System?
• Human Respiratory System
• Parts of Respiratory Tract
• Features of Respiratory System
• Functions of Respiratory System
The Respiratory System
The respiratory system is a biological
system consisting of specific organs and
structures used for gas exchange in animals
and plants.
Human Respiratory System is the organ
system that involves inhaling of oxygen and
exhaling of carbon dioxide to meet the
energy requirements.”
What is the Respiratory System?
The human respiratory system consists of a
group of organs and tissues that help us to
breathe. Lungs are the primary organs of the
respiratory system which help in the
exchange of gases. The other main parts of
this system include a series of airways for
air passages, blood vessels and the
muscles that facilitate breathing.
Diagram of Respiratory System
Parts of Respiratory Tract
• External nostrils – For the intake of air.
• Nasal chamber – which is lined with hair
and mucus to filter the air and remove dust
and dirt.
• Pharynx – It is a passage behind the nasal
chamber and serves as the common
passageway for both air and food.
• Larynx – Also known as the soundbox as it
helps in the generation of sound and thus
helps us in communicating.
.......
• Epiglottis – It is a flap-like structure that
covers the glottis and prevents the entry
of food into the windpipe.
• Trachea – It is a long tube passing
through the mid-thoracic cavity.
• Bronchi – The trachea divides into left
and right bronchi.
• Bronchioles – Each bronchus is further
divided into finer channels known as
bronchioles.
.......
• Alveoli – The bronchioles end up into the
balloon-like structures known as the
alveoli.
• Lungs – We have a pair of lungs, which
are sac-like structures and covered by a
double-layered membrane known as
pleura.
Features of the Human Respiratory System
• Oxygen is inhaled and is transported to various
parts and are used in the process of burning
food particles (breaking down of glucose
molecules) at the cellular level in a series of
chemical reactions.
• The obtained glucose molecules are used for
discharging energy in the form of ATP-
(adenosine triphosphate molecules) by the
human body to fulfil essential life processes.
• The energy is generated by the breakdown of
glucose molecules in all living cells of the human
body.
Functions of Respiratory System
• The respiratory system helps in
breathing, known as pulmonary
ventilation. The air inhaled through the
nose moves through the pharynx, larynx,
and trachea into the lungs. The air is
exhaled back through the same pathway.
Changes in the volume and pressure in
the lungs aid in pulmonary ventilation.
Exchange of Gases between Lungs
and Bloodstream
Inside the lungs, the oxygen is exchanged
for carbon dioxide waste through millions of
microscopic sacs called alveoli. The inhaled
oxygen diffuses into the pulmonary
capillaries, binds to haemoglobin and is
pumped through the bloodstream. The
carbon dioxide from the blood diffuses into
the alveoli and is expelled through
exhalation.
Exchange of Gases between
Bloodstream and Body Tissues
The blood carries the oxygen from the
lungs around the body and releases the
oxygen when it reaches the capillaries.
The oxygen is diffused through the
capillary walls into the body tissues. The
carbon dioxide also diffuses into the blood
and is carried back to the lungs for release.
The Vibration of the Vocal Cords
While speaking, the muscles in the larynx
move the arytenoid cartilage. These
cartilages push the vocal cords together.
During exhalation, when the air passes
through the vocal cords, it makes them
vibrate and creates sound.
Olfaction or Smelling
During inhalation, when the air enters the
nasal cavities, some chemicals present in
the air bind to it and activate the
receptors of the nervous system on the
cilia. The signals are sent to the olfactory
bulbs via the brain.
.
Thanks for Watching.
Please Like, Share & Comment.
poojawaliakuk@gmail.com

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Respiratory system

  • 1. Respiratory System Dr. Pooja Walia Assistant Professor Dept. of Education
  • 2. Outline of the Presentation • What is Respiratory System? • Human Respiratory System • Parts of Respiratory Tract • Features of Respiratory System • Functions of Respiratory System
  • 3. The Respiratory System The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. Human Respiratory System is the organ system that involves inhaling of oxygen and exhaling of carbon dioxide to meet the energy requirements.”
  • 4. What is the Respiratory System? The human respiratory system consists of a group of organs and tissues that help us to breathe. Lungs are the primary organs of the respiratory system which help in the exchange of gases. The other main parts of this system include a series of airways for air passages, blood vessels and the muscles that facilitate breathing.
  • 6. Parts of Respiratory Tract • External nostrils – For the intake of air. • Nasal chamber – which is lined with hair and mucus to filter the air and remove dust and dirt. • Pharynx – It is a passage behind the nasal chamber and serves as the common passageway for both air and food. • Larynx – Also known as the soundbox as it helps in the generation of sound and thus helps us in communicating.
  • 7. ....... • Epiglottis – It is a flap-like structure that covers the glottis and prevents the entry of food into the windpipe. • Trachea – It is a long tube passing through the mid-thoracic cavity. • Bronchi – The trachea divides into left and right bronchi. • Bronchioles – Each bronchus is further divided into finer channels known as bronchioles.
  • 8. ....... • Alveoli – The bronchioles end up into the balloon-like structures known as the alveoli. • Lungs – We have a pair of lungs, which are sac-like structures and covered by a double-layered membrane known as pleura.
  • 9. Features of the Human Respiratory System • Oxygen is inhaled and is transported to various parts and are used in the process of burning food particles (breaking down of glucose molecules) at the cellular level in a series of chemical reactions. • The obtained glucose molecules are used for discharging energy in the form of ATP- (adenosine triphosphate molecules) by the human body to fulfil essential life processes. • The energy is generated by the breakdown of glucose molecules in all living cells of the human body.
  • 10. Functions of Respiratory System • The respiratory system helps in breathing, known as pulmonary ventilation. The air inhaled through the nose moves through the pharynx, larynx, and trachea into the lungs. The air is exhaled back through the same pathway. Changes in the volume and pressure in the lungs aid in pulmonary ventilation.
  • 11. Exchange of Gases between Lungs and Bloodstream Inside the lungs, the oxygen is exchanged for carbon dioxide waste through millions of microscopic sacs called alveoli. The inhaled oxygen diffuses into the pulmonary capillaries, binds to haemoglobin and is pumped through the bloodstream. The carbon dioxide from the blood diffuses into the alveoli and is expelled through exhalation.
  • 12. Exchange of Gases between Bloodstream and Body Tissues The blood carries the oxygen from the lungs around the body and releases the oxygen when it reaches the capillaries. The oxygen is diffused through the capillary walls into the body tissues. The carbon dioxide also diffuses into the blood and is carried back to the lungs for release.
  • 13. The Vibration of the Vocal Cords While speaking, the muscles in the larynx move the arytenoid cartilage. These cartilages push the vocal cords together. During exhalation, when the air passes through the vocal cords, it makes them vibrate and creates sound.
  • 14. Olfaction or Smelling During inhalation, when the air enters the nasal cavities, some chemicals present in the air bind to it and activate the receptors of the nervous system on the cilia. The signals are sent to the olfactory bulbs via the brain.
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