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20 Cards in this Set

  • Front
  • Back
The major function of the respiratory system
is to supply the body with oxygen and dispose of carbon dioxide.
Four processes called reslperations are
1.pulmonary ventilation
2.external respiration
3.transport of resporatory gases
4.internal respiration
Pulmonary ventilation is
mobement of air into and out of the lungs so that the gases there are continously changed and refreshed (breathing)
External respiration is
movement of oxygen from the lungs to the blood and of carbon dioxide from the blood to the lungs.
Transport of respiratory gases
transport of oxygen from lthe lungs to the tissue cells of the body, and of carbon dioxide from the tissue cells to the lungs.
This is accomplished by the cardiovascular system using blood as lthe transporting fluid.
Internal respiration
movement of exygen from blood to the tissue cells and of carbon dioxide from tissue cells to blood.
the Pulmonary ventilation and External respiration are
the special responsibility of the respiratory system.
Respiratory system includes the
1. Nose
2. Nasal Cavity
3. Pharynx
4. Larynx
5. Trachea
6. Bronchi, & their smaller branches
7. Lungs (contain terminal air sacs or alveoli)
Respiratory zone
site of gas exchange
composed of respiratory bronchioles, alveolar ducts, and alveoli.
Conducting zone
organs cleanse, humidify, and warm incoming air.
include all other respiratory passageways, which provide fairly rigid conduits for air to reach the gas exchange sites.
The nose
is the only externally visible part of the respiratory system.
the nose
1. provides an airway for respiration
2. moistens and warms entering air
3. filters and cleans inspired air
4. serves as a resonating chamber for speech
5. louses the olfactory (smell) receptors
The surface features of the external nose include
1.the root (area between the eyebrows)
2. bridge
3. Dorsum Nasi(anterior margin)
4. Apex (tip of the nose)
5. Nostrils or external nares (are bound laterally by the flard alae)
Noses vary in size and shape
because of defferences in the nasal cartilages.
Internal nasal cavity
divided by a midline nasal septum.
continuous posteriorly with the nasal portion of the pharynx through the posterior nasal apertures(internal nares, or choanae (funnels)
Pharynx (Throat)
connects the nasal cavity and mouth superiorly to the larynx and esophagus inferiorly.
Pharynx is divided into three regions
1. nosapharynzx
2. oropharynx
3. larygopharynx
posterior to the nasal cobity, inferior the the spheniod bone and superiorto the levelof the soft palate.
During swallowing the soft palate and uvula
move superiorly to prevent food from entering the nasal cavity
has the pharyngeal tonsil (adenoids) which traps and destroys pathohens entering.