The respiratory system allows for gas exchange between the external environment and tissues of the body. It involves two phases - external respiration where gases are exchanged between the atmosphere and blood, and internal respiration where gases are exchanged between the blood and body tissues. The main organs involved are the nose, nasal cavity, larynx, trachea, bronchi, bronchioles and alveoli in the lungs. The lungs and respiratory tract work together to inhale oxygen and exhale carbon dioxide in a cyclic breathing process.

1. RESPIRATORY
SYSTEM
Prepared by:
MARICARR D. ALEGRE

2. RESPIRATION
• a life process common to
both plants and animals
• There is an exchange of
oxygen and carbon dioxide

3. RESPIRATORY SYSTEM

4. Phases of Respiration
• External Respiration
–Exchange of gases between
the atmosphere and the
blood
• This involves the lungs

5. Phases of Respiration
Internal Respiration
Exchange of gas
between the blood and
the body tissues

6. Breathing
-a mechanical process that helps
get air into and out of the lungs
STAGES
1. INSPIRATION –intake of air
2. EXPIRATION – breathing out
of air

7. PARTS OF THE
RESPIRATORY
• Nasal cavity
• Larynx
• Trachea
• Bronchial tubes
• Lungs (bronchioles and
alveoli)

8. NOSE

9. NOSE
• Serves as the entrance to your nasal
cavity
• Inside the nasal cavities are cilia
which filters the air and trap the any
microorganisms
• A ciliated mucous membrane is also
found in the lining of the nasal cavity

10. NASAL CAVITY

11. LARYNX

12. LARYNX
• Also called Adams apple or
vocal cords
• Passage way of air we breath
• It is protected by a muscle
known as epiglottis

13. TRACHEA

14. TRACHEA
• Also called as the windpipe
• Lined with cilia and fluid that
traps germs and other
materials from the air
• Cilia also traps dust and dirt
upward away from the lungs

15. LUNGS

16. LUNGS
• located on each side of the
chest
• They are separated by your
heart, blood vessels and your
esophagus
• Serves as an organ for breathing

17. BRONCHIAL TUBES
• Branches of
the trachea
that is
embedded in
the lungs

18. BRONCHIOLES
Small
branches
of bronchi

19. ALVEOLI
• Also known
as the air
sacs
• It is where
the
exchange of
gases
happen