This document provides information about the respiratory system and breathing process. It begins with defining key terms related to respiration. It then describes the main parts of the respiratory system, including the airways, nasal passages, pharynx, larynx, trachea, bronchi, bronchioles and lungs. It explains that breathing allows oxygen to enter our cells and carbon dioxide to be expelled. Finally, it outlines the two phases of breathing - inhalation where oxygen enters and exhalation where carbon dioxide leaves.

2. Index.
 1.New
words
 2.Breathing and parts of the
respiratory system.
 3.Phases of breathing.
 4.Activities.
 5.Experiment.

3. Unit 3(b): Human body.
1.
New words.
Airways- vías respiratorias.
Nassal passages- fosas nasales.
Pharynx- faringe.
Larynx- laringe.
Trachea- traquea.
Bronchus /bronqui- bronquios.
Bronquiole/bronquiolesbronquiolos

4. Unit 3(b): Human body.
1.








New words.
Lungs – pulmones.
Diaphragm-diafragma.
Inhalation- inalación
Exhalation- exhalar
It warms-calienta
It moisteus- humedece
It filters- filtra
Inhaled-inhalado

5. Unit 3(b): Human body.
1.








New words.
Vocal cords- cuerdas
vocales.
It reaches- alcanza.
Network- red.
Branches- ramas.
Exchanged- intercambio.
Increase- aumentar.
Relaxes- relajar.
Keep- mantener.

6. Unit 3(b): Human body.
2. Breathing and parts of the respiratory
system.
-By breathing we obtain the
oxygen our cells need to
work and excrete the
carbon dioxide our cells
produce as a residue.

7. Unit 3(b): Human body.
PARTS OF THE RESPIRATORY SYSTEM.

-The
airways- the nassal passages,
the pharynx, the larynx, the
trachea, the bronchi, the
bronchioles and the alveoli.

 The
lungs- are separated from
the abdomen by the diaphragm.

8. Unit 3(b): Human body.
3-The phases of
breathing.
There
are two phases
when you are breathing:
3.1- Inhalation.
3.2- Exhalation.

9. Unit 3(b): Human body.
3.1 Inhalation.
 The
air enters into the nasal passages
and continues down the alveoli.
 The diaphragm contracts.
 The volume of lungs increases.
 The oxygen passes into the blood,
which distributes around the body.
 The carbon dioxide in the blood
passes to the alveoli.

10. Unit 3(b): Human body.
3.2. Exhalation.
The
diaphragm relaxes and
the lungs get smaller.
The air full of carbon
dioxide is expelled through
the airways.

11. Unit 3(b): Human body.
4. Activities.
Page
27 (3)
Page
27 (1 and 2)