The respiratory system is the set of organs that allows a person to
breathe and exchange oxygen and carbon dioxide throughout the
body.
The integrated system of organs involved in the intake and
exchange of oxygen and carbon dioxide between the body and
the environment and including the nasal passages, larynx,
trachea, bronchial tubes, and lungs.
The respiratory system performs two major tasks:
Exchanging air between the body and the outside
environment known as external respiration.
Bringing oxygen to the cells and removing carbon dioxide
from them referred to as internal respiration.
, Nose
Mouth
Bronchial tubes
Trachea
Lung
Diaphragm
, 1. Supplies the body with oxygen and disposes of carbon dioxide
2. Filters inspired air
3. Produces sound
4. Contains receptors for smell
5. Rids the body of some excess water and heat
6. Helps regulate blood pH
Breathing
Breathing (pulmonary ventilation).
consists of two cyclic phases:
Inhalation, also called
inspiration - draws gases into
the lungs.
Exhalation, also called
expiration - forces gases out of
the lungs.