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The Respiratory System
Lesson 15
Major Parts of the Respiratory System
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ACTIVITY TIME!!!
The Respiratory Organs
Respiratory Organ
Structure
Function
1. Nostril
Opening which leads to the Enables air to enter the
nasal cavity.
nasal cavity.
2. Pharynx
Throat cavity
Enables air from the nasal
cavity to enter the trachea.
3. Tonsils
Soft mass of lymph tissues
Produces sounds
4. Larynx
Triangular ridge called the
Adam’s apple; contains the
vocal cords.
Produces sounds
5. Epiglottis
Leaf-like plate of flexible
cartilage.
Controls opening to larynx.
The Respiratory Organs
Respiratory Organ
Structure
-Function
6. Trachea
Tube measuring 11.5 cm
long and 2.5 cm in
diameter; also called the
wind pipe.
Enables air to get to the
lungs; a passageway.
7. Bronchi
Two tubes found at the
lower end of the trachea.
Enable air to pass through.
8. Bronchioles
Network of bronchial tubes Allow the exchange of
ending in a tiny chamber.
oxygen and carbon dioxide;
contain air sacs.
9. Alveoli or Air sac
Air sac surrounded by
many blood vessels.
Main organ or respiration.
10. Lung
Sponge-like cone-shaped
organs composed of three
lobes, separated by pleural
membranes.
Filters and purifies air.
Evaluation: Label the Parts of the
Respiratory System
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Assignment No. 15
• Bring the following materials tomorrow:
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e.
f.
Plastic bottle
Small rubber balloons
Plastic bag
Rubber bands
Plastic straw
Clay