This document describes the key parts and functions of the human respiratory system. It explains that air enters through the nose, where nasal hairs and mucus trap dust and pollutants. The air is warmed and humidified before passing through the pharynx, larynx, trachea, bronchi and bronchioles to reach the alveoli in the lungs where gas exchange occurs. Oxygen is absorbed into the bloodstream while carbon dioxide is released. The lungs and chest cavity are lined by pleura and breathing is facilitated by the diaphragm. The respiratory and digestive systems work together to provide oxygen and glucose for cellular respiration. Some common respiratory disorders are also outlined.

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3.  Brings air
into the body
 Nasal hairs in
nostrils trap
dust

5.  Warms & moistens
air
 Glands that
produce sticky
mucus line the
nasal cavity
 traps dust, pollen,
and other materials
that were not
trapped by nasal
hairs
 cilia sweep mucus
and trapped
material to the
back of the throat

6.  Tube-like
passageway used
by food, liquid,
and air
 At the lower end
of the pharynx is
a flap of tissue
called the
epiglottis
 covers the
trachea during
swallowing so
that food does
not enter the

7.  “Voice box”
 The airway to
which two pairs
of horizontal
folds of tissue,
called vocal
cords, are
attached

8.  Air-conducting
tube
 Connects the
larynx with the
bronchi
 Lined with
mucous
membranes and
cilia
 Contains strong

9.  Two short tubes
that branch off
the lower end
of the trachea
 Carry air into
the lungs.
 Singular -
bronchus

10.  Tiny branches
of air tubes in
the lungs
 Connect
bronchi to
alveoli

11.  Tiny, thin-
walled,
grapelike
clusters at the
end of each
bronchiole
 Surrounded by
capillaries
 Where carbon
dioxide and
oxygen
exchange take
place
 Singular -

14.  Membrane lining the lungs and chest
cavity

15.  Muscle wall between the chest and the
abdomen that the body uses for breathing

18.  Cellular respiration requires
glucose and oxygen to release
energy to the body
 C6H12O6 + 6O2  6CO2 + 6 H2O + Energy
 Oxygen is provided by the respiratory
system
 Glucose is provided by the digestive
system
 (glucose is made during
photosynthesis)

19. Human Respiratory
Disorders

20. An inflammation of mucus membrane in bronchi.
The symptom include cough followed by fever and pain
in chest

21. A lung infection caused by
Mycobacterium tuberculosis

22. An inflammation of the tonsils caused by bacteria

23. An infection caused by bacteria
Corynebacterium diphteriae. It can cause heart complication
followed by fever and sometimes can cause paralysis

24. A respiratory illness caused by the disturbance of
respiratory muscles work. It can be caused by allergic or
physical pressure. Signed by difficulty in breathing that is
shown by shortness of breath

25. A respiratory illness caused by swollen lung that leads to
shortness breath

26. An inflammation of the mucus membrane of the nose