7. PARTS OF RESPIRATORY SYSTEM
• NOSTRILS
• NASAL CAVITY
• PHARYNX
• TRACHEA
• BRONCHI
• BRONCHIOLES
• ALVEOLI
8.
9. NOSTRILS
• Opening through which air enters into the
body
• Minute hair and mucus prevent entry of dust
and germs
10.
11. • Nostrils are followed by nasal cavity
• Nasal cavity opens into pharynx
• Oesophagus and trachea starts from pharynx
12.
13. . Branches of trachea : Bronchi
• Each bronchus open into lungs
• Bronchi devides into small branches :
Bronchioles
• Bronchioles enter into alveoli
14.
15. • Alveoli increase the surface area of lungs and
efficiency of exchange of gases
16.
17. LUNGS
• Found on either side of thoracic cavity
• Protected with pleura and pleural fluid