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RESPITORY
SYSTEM
By: Chastday Garza
What the Respiratory system does
 It's purpose is to bring
oxygen into your body
 It helps your body get
rid of that carbon
dioxide.
 The passageways
purify, humidify, and
warm incoming air
What it consist of
 Ventilation - the exchange of
respiratory gases (O2 and CO2)
between the atmosphere and
the lungs
 External respiration - the
exchange of gases between the
lungs and the blood
 Internal respiration - the
exchange of gases between the
blood and the systemic tissues
 Cellular respiration - the
includes the metabolic pathways
What are the main parts?
 The respiratory system
includes the nose,
pharynx, trachea , bronchi
and there smaller
branches in the lungs
 The lungs contain the
aveoli, or terminal air sacs
The Nose
 Nose- Only externally visible
part of the respiratory system
 Sticky mucus produced by the
mucosa’s gland traps incoming
bacteria and other foreign
debris
 Surrounded by a ring of
paranasal sinuses located in the
frontal, sphenoid, ethoid and
maxillary bones
The Pharynx (throat)
 Pharynx- a muscular
passageway about 13
cm (5 in) long that
vaguely resembles a
short length of red
garden hose
 Connected to the nose
(continuation)
 Air enters the nasopharnx,
form the nasal captivity and
descends through the
oropharynx and
laryngophary to enter the
larynx below
 Includes tonsils and adenoid
The Larynx
 Larynx- voice box, routes air
and food into proper channels
and plays a role in speech
 Has a spoon-shaped flap of
elastic cartilage, the epiglottis
 Also has a shield-shaped
Thyroid cartage which produces
interiorly and is commonly
called “Adams apple”
(continuation)
 When swallow larynx is
pulled upward and the
epiglottis tips, forming
a lid over the opening
The Trachea
 Windpipe from the larynx travels down
the length to the level of the fifth
thoracic vertebra, in the mid chest
 Cilia continuously and in the direction
opposite to the incoming air
 It is rigid because its walls are reinforced
with c-shaped rings of hyaline cartilage
(Continuation)
 The rings purpose are
to open parts of the
rings about the
esophagus and allow it
to expand when we
swallow large pieces or
foods
The Primary Bronchi
 Primary Bronchi- formed by the
division of the trachea
 The right primary bronchus is
wider, shorter, and straighter
than the left
 By the time air is reached it is
was cleaned , and well
humidified
 The smaller one is direct routes
to the air sacs
The Lungs
 Lungs- large organs
 Mediastium which houses the heart,
the great blood vessles, bronchi,
esophagus, and other organs
 Left lung has two lobes and the right
has three
 Walls of the alveoli are composed
largely of single , thin layer of
squamous epithelial cells