8th Grade Respiration 1 Lesson

 RESPIRATION

Learning outcomes:

Content:

1.  to be able to explain lungs structure, gas exchange in the lungs and body tissues, regulation of respiration;

2.  to be informed about consequences of bad health behaviour;

3.  to be able to help person who suffers from CO poisoning.

Language:

to be able to discuss your intensions to given topic.

Exercise 1. Step one (individual work). Fill the table with know, want, learned columns. Keep track of these in future lessons on this topic.

KNOW	WANT	LEARNED

Step two (team work). Explain your neighbours what you know and want to learn about your respiration.

Exercise 2 (individual work). Watch the video and answer the questions (https://goo.gl/G4BFL5):

1.      What is the structure of respiratory system?

2.      What are the functions of nasal cavity?

3.      What is the function of trachea?

Step 2 (pair work). Discuss the answers with your face partner.

Exercise 3. Step one (individual work). Fill in the blanks by using given words and phrases:

throat           carbon dioxide                diffusion                 humidify                conducting zone              gas exchange               responsible                      major                               respiratory zone              out of the lungs

The breathing system is (A)_______ for getting oxygen and getting rid of (B)______, and helping in speech production and in sensing smells. From a functional perspective, the respiratory system can be divided into two (C)______ areas: the conducting zone and the (D)______. The conducting zone consists of all of the structures that provide passageways for air to travel into and (E)_______: the nasal cavity, throat, trachea, bronchi, and most bronchioles. The nasal cavity helps to warm and (F)_____ incoming air, while removing dirts and pathogens. Then air travels through other structures of the (G)______ to the lungs.

The respiratory zone includes the structures of the lungs that are directly involved in (H)______: the bronchioles and alveoli. The lining of the conducting zone is composed mostly of pseudostratified hair-lined columnar epithelium. The mucus traps pathogens and dirts, whereas beating cilia move the mucus upwards to the (I)______, where it is swallowed. As the bronchioles become smaller and smaller, and nearer to the alveoli, the epithelium thins. The endothelium of the surrounding capillaries, together with the alveolar epithelium, forms the respiratory membrane. This is a blood-air barrier through which gas exchange happens by simple (J)______.

Step two (pair work): Compare your results with the correct answers shown by your teacher and discuss them with your partner.