Respiration

Pharynx

Larynx

Trachea

Bronchi (Bronchus)

          Bronchioles

          Alveoli

Epiglottis

          Heimlich maneuver

Pleural membrane

Diaphragm

Intercostal muscles

Inspiration

Expiration

Tidal Volume

Vital Capacity

Respiratory pigments

          Hemoglobin

                    Heme

Atmospheric air

Exhaled air

                                                     
Pathway of Air:

Mouth or nose (hairs act as a filter) ------> Pharynx (shared by digestive 

and respiratory systems) -------> Larynx (contains vocal cords - voice box) -------> 

Trachea (mucus elevator) ------> Bronchi (one bronchus to each lung) -------> 

Bronchioles (million per lung)  ------> Alveoli (clusters of tiny air sacs). 




		   Composition of :

Atmospheric air:	     Exhaled air:

   21% - Oxygen	     16% - Oxygen

    .04% - CO2	     4.4% - CO2

   79% - Nitrogen	      79% - Nitrogen