RESPIRATORY SYSTEM
Breathing System
Respiratory
System
The human respiratory
system is a series of
organs responsible for
taking in oxygen and
expelling carbon dioxide.
The primary organs of
the respiratory system
are lungs, which carry
out this exchange of
gases as we breathe.
Inhale/ Exhale
Oxygen=In / Carbon Dioxide= Out
Compare:
Bunch of Grapes
LUNGS
ACTIVITY 1 PART A
Identify the parts of the breathing
system that are similar to the
structure of the bunch of grapes
PARTS AND FUNCTION
OF THE RESPIRATORY
SYSTEM
NASAL CAVITY
is a large air filled space above
and behind the nose in the
middle of the face.
conditions the air to be
received by the other areas of
the respiratory tract.
Each cavity is the continuation
of one of the two nostrils.
TRACHEA
empty tube that serves as
passageway of air into the lungs.
Also called as windpipe.
 connects the pharynx and larynx
to the lungs.
Belongs to the lower respiratory
tract.
Inflammation of the trachea is
known as tracheatis
BRONCHI
 Singular (Bronchus)
 two branching tubes that connect the
trachea to the lungs.
 passage of airway in the respiratory
tract that conducts air into the lungs.
 No gas exchange takes place in this
part.
BRONCHIOLES
hairlike tubes that connect to
the alveoli.
It’s branches no longer contain
cartilage or glands in their
submucosa.
ALVEOLI
airsacs that allow gas exchange
in the lungs.
anatomical structure that has
the form of a hollow cavity.
Parts of the Respiratory System
ACTIVITY 2: PART B
GUIDE QUESTIONS:
1.What does each part of the “Bunch of
Grapes” model represent, in relation
to the breathing system?
2. How will you describe the pathway of
oxygen in the breathing system?
3.What will happen if one part of the
system fails to carry out its function
properly?
1. In the lungs, oxygen is
absorbed into the blood. In
which part of the lungs does
this mainly happen?
a.alveoli
b.bronchi
c.Bronchioles
d.trachea
2. Which of the following correctly
name the parts labeled in the diagram
on the right?
3. Analyze the diagram of the human
breathing system on the left. Which of
the following is the correct order for air
passing through the lungs?
3. Analyze the diagram of the human
breathing system on the left. Which of
the following is the correct order for air
passing through the lungs?
4. Which process does not occur
in the nasal cavity?
5. Which of the choices below is not a
functional process performed by the
respiratory system?