Anatomy & Physiology of Human Respiratory System

1. The Respiratory
System
RAKHSHANDA HASHMI
BS Ed.DEPARTMENT OF
EDUCATION,NUML,Isb

2. Primary Function of
Respiratory System
• The respiratory system supplies the
blood with oxygen so that the blood
can deliver oxygen to all parts of the
body.
• And also removes carbon dioxide
waste that cells produce.
• . If you didn’t breathe you would pass
out or die.

9. Respiratory System Structure
• Nasal Cavity: Passes air through nose
• Mouth: Passes air through
• Pharynx: The throat. Cone shaped passageway
leading to trachea.
• Trachea: Windpipe. Main tube connecting
nose/mouth to lungs.
• Epiglottis: Flap that covers the entrance to the
trachea.
• Lungs: Main organ of the respiratory
system.

10. Respiratory System Structure
• Bronchi: Two tubes inside of lungs that air passes
through to the bronchioles.
• Bronchioles: Small branching out tubes divided
into alveoli.
• Alveoli: Tiny air sacs that do the oxidation and
the exhale of carbon dioxide.
• Capillaries: Blood vessels that are imbedded in
the walls of the alveoli. While in the capillaries
the blood discharges carbon dioxide into the
alveoli and takes up oxygen from the air in the
alveoli.
• Cilia: Hair like structures that remove dust and
dirt from the air.

11. How the Respiratory System
Works
Air that flows from the mouth or nasal
cavity travels through the pharynx and
moves down to the trachea. Then the air
moves to the bronchi tubes as they enter
the lungs. Once the air gets in the lungs,
the air enters separate branches called
the bronchiole. Carbon dioxide passes
from the blood into the alveoli and is then
exhaled.

12. How the Respiratory System
Works
Once in your lungs Oxygen travels
from your lungs through the bloodstream
to the cells in all parts of your body. Cells
use the oxygen as fuel and give off
carbon dioxide as waste gas.The waste
gas is carried by the bloodstream back to
the lungs to be exhaled.

13. INTERESTING
FACTS!!!!

14. Why Do I Yawn?
When you are sleepy or drowsy the
lungs do not take enough oxygen from
the air. This causes a shortage of
oxygen in our bodies. The brain
senses this shortage of oxygen and
sends a message that causes you to
take a deep long breath---a YAWN.

15. Why Do I Sneeze?
Sneezing is like a cough in the upper breathing
passages. It is the body's way of removing an
irritant from the sensitive mucous membranes of
the nose. Many things can irritate the mucous
membranes. Dust, pollen, pepper or even a cold
blast of air are just some of the many things that
may cause you to sneeze.

16. What Causes Hiccups?
Hiccups are the sudden movements of the diaphragm
. It is involuntary --- you have no control over hiccups,
as you well know. There are many causes of hiccups.
The diaphragm may get irritated, you may have eaten
to fast, or maybe some substance in the blood could
even have brought on the hiccups.

17. • About half a liter of water per day is lost
through breathing.
• Yawning brings more oxygen to the lungs.
• Your right lung is larger than your left.
• Your right lung has three lobes and your
left lung only has two
• We breathe 13 pints of air every minute.

18. Cont…
People under 30 take in double the amount f oxygen in
comparison to someone who's 80 years old
A person sleeping almost always breathes twelve or
fifteen times a minute.
•The fastest recorded “ sneeze speed” is 165 km per
hour?
• It is healthier to breathe through your nose than your
mouth, because your nose hairs and mucus clean the
air.

19. How to keep your
respiratory system healthy
• Try to Avoid:
-Smoking
-Being around a smoker(SecondHand)
-Inhaling other chemicals and drugs.
-Being around dusty or thick polluted
air.
• What to do:
- Exercise
- Eat healthy
- Go to annual doctor checkups