I. Objective Describe the function of each part of the respiratory system. II. Subject Matter

A. Function of the Different Parts of the Respiratory System B. References:

PELC I.2.2 Into the Future 5, p. 19

C. Science Concept: The functions of the different parts of the respiratory system are: 1. Nostrils – enables air to enter the nasal cavity 2. Pharynx – enables air from the nasal cavity to enter the trachea 3. Larynx – produces sounds 4. Trachea – enables air to get to the lungs 5. Bronchioles – allow for the exchange of oxygen and carbon dioxide 6. Lungs– filter and purifies air

D. Science Processes: observing, identifying E. Materials: charts, activity sheet, illustration

III. Procedure A. ENGAGE

1. Science Updates Endoscopy means looking inside and typically refers to looking inside the body for medical reasons using an endoscope, an instrument used to examine the interior of a hollow organ or cavity of the body. Unlike most other medical imaging devices, endoscopes are inserted directly into the organ. Endoscopy can also refer to using a borescope in technical situations where direct line of-sight observation is not feasible.

2. Review What are the parts of the respiratory system?

3. Science Vocabulary bronchi bronchioles alveoli

4. Motivation Show picture of the lungs. What do you think is the function of the lungs in respiration?

B. EXPLORE

Presentation Using the diagram, pupils will identify the functions of each part of the respiratory system. a. Setting of standards to be followed in doing the activity b. Group activity

C. EXPLAIN

Analysis/Discussion Group reporting Answer the following questions

What enables air to enter the nasal cavity? What is the role of the pharynx in the respiratory system? What is the importance of the epiglottis in the respiratory system? What is the function of the alveoli ? What is the role of the lungs in the respiratory system?

Concept Formation What are the functions of the different parts of the respiratory system?

The functions of the different parts of the respiratory system are: 1. Nostrils – enables air to enter the nasal cavity 2. Pharynx – enables air from the nasal cavity to enter the trachea 3. Larynx – produces sounds 4. Trachea – enables air to get to the lungs

5. Bronchioles – allow for the exchange of oxygen and carbon dioxide 6. Lungs – filter and purify air.

D. ELABORATE

Application Fill in the blanks with the correct answer. Choose your answer inside the box.

lungs alveoli windpipe or trachea pharynx epiglottis bronchioles bronchial tubes nostrils

Respiration begins at the nose as air enters through the _____________. Inside the nose are tiny hairs which filter the dust and germs from the air. Mucus along the walls of the nose warm and moisten the air. That is why at the end of the day, the inside of your nose becomes dirty. Air goes down the ________________ . It serves as the passageway for the both air and food. It leads to a long tube called ________________________. There is a little flap on the top of the trachea. It is called ______________________. The epiglottis closes the windpipe when one swallows food or liquids. The trachea branches out into pipes called _______________________ or bronchi. These lead to the lungs. The bronchi further branch out into smaller tubes called ______________________. These bronchioles look like the branches of a tree whose ends have balloonlike sacs or bags. These sacks are filled with air giving the lungs a sponge like quality. These sacks are called _________________. The __________________ are the lightest organs in the body. It filters the air. The actual exchange of gases takes place in the alveoli.

E. EVALUATE

Directions: Match the parts of the respiratory system in column A with its function in column B. Write only the letter of your answer. COLUMN A COLUMN B

1. nostrils A. closes when someone swallows food or drink 2. pharynx B. filter and purify air 3. epiglottis C. enables air to get to the lungs 4. trachea D. allow for the exchange of gases 5. lungs E. enables air to enter the trachea

F. enables air to enter the nasal cavity IV. Assignment Memorize the different parts and function of the respiratory system. Be ready to recite it front of the class. PL =