1. The Respiratory System
Lesson 15

2. Major Parts of the Respiratory System2 1 3 5 4 7 6 8 9 12 11 10

3. ACTIVITY TIME!!!

4. The Respiratory Organs
Structure
Function
Nostril
Opening which leads to the nasal cavity.
Enables air to enter the 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.
5. Epiglottis
Leaf-like plate of flexible cartilage.
Controls opening to larynx.

5. The Respiratory Organs
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 ending in a tiny chamber.
Allow the exchange of 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.

6. Evaluation: Label the Parts of the Respiratory System2 1 3 5 4 7 6 8 9 12 11 10

7. Assignment No. 15 Bring the following materials tomorrow:
Plastic bottle
Small rubber balloons
Plastic bag
Rubber bands
Plastic straw
Clay