Department of Health & Human Services

RESPIRATORY SYSTEM AND SMOKING
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Name of the University

ANATOMY AND PHYSIOLOGY OF RESPIRATORY
SYSTEM
 The respiratory system comprises of larynx, nasal cavity, pharynx, ,
trachea, bronchi, and lungs.
-upper respiratory tract from Nose to Larynx
- and lower respiratory tract (bronchi, trachea, and
Lungs).
 Upper respiratory tract includes larynx and it consists of both the
upper and lower system.
 It also contains nasal cavity, pharynx.
 Lower respiratory tracts contains trachea which is the largest duct in
the respiratory tract. In this, bronchi and bronchioles are present.
 These bronchioles creates air sacs that is alveoli.

ANATOMY AND PHYSIOLOGY OF RESPIRATORY
SYSTEM
 Alveoli are tiny pouches
found in lungs where gas
exchange occurs.
 Next, lungs are the largest
organ of lower respiratory
tract. A thin membrane
called pleura covers the
lungs.

PROCESS OF BREATHING(RESPIRATION)
 The rhythmic process of
breathing that is gas exchange
is known as respiration.
 Respiration is of two
processes-
1. External respiration
2. Internal respiration
1. External respiration is the
uptake of oxygen and
excretion of carbon-di-oxide
between the blood and lungs
2. 2. Internal respiration
denotes the O2 & CO2
exchange between the cells
and capillary blood.
Source- researchgate.net