RESPIRATORY
SYSTEM
,Functions:
- Provides gas exchange
- Olfaction
- Blood storage (well blood supply)
- Blood clotting (synthesis in the lungs of
thromboplastin and heparin)
- Endocrine (synthesis of biologically active
substances which act on bronchi tonus)
- Immune or protective (presence of lymphocytes,
macrophages)
,Two principle subdivisions of the respiratory system
1. AIR CONDUCTING PORTION
a. Nasal cavity, oral cavity
b. Nasopharynx, oropharynx, and larynx
c. Trachea
d. Bronchi (main, lobar, segmental, subsegmental)
e. Terminal bronchioles
These provide a passageway to and from lungs
These components also "condition" the inspired air (i.e. moistens,
removes particles and some noxious gases, warms air)
2. RESPIRATORY PORTION (RESPIRATORY ACINUS – morpho-
functional unit)- 12-18 acini make a lobule
a. respiratory bronchioles (3-4 order
b. alveolar ducts
c. alveolar sacs
d. alveoli used for gas exchange
Provide gas exchange
,
SYSTEM
,Functions:
- Provides gas exchange
- Olfaction
- Blood storage (well blood supply)
- Blood clotting (synthesis in the lungs of
thromboplastin and heparin)
- Endocrine (synthesis of biologically active
substances which act on bronchi tonus)
- Immune or protective (presence of lymphocytes,
macrophages)
,Two principle subdivisions of the respiratory system
1. AIR CONDUCTING PORTION
a. Nasal cavity, oral cavity
b. Nasopharynx, oropharynx, and larynx
c. Trachea
d. Bronchi (main, lobar, segmental, subsegmental)
e. Terminal bronchioles
These provide a passageway to and from lungs
These components also "condition" the inspired air (i.e. moistens,
removes particles and some noxious gases, warms air)
2. RESPIRATORY PORTION (RESPIRATORY ACINUS – morpho-
functional unit)- 12-18 acini make a lobule
a. respiratory bronchioles (3-4 order
b. alveolar ducts
c. alveolar sacs
d. alveoli used for gas exchange
Provide gas exchange
,
