Human respiratory organs:
Are nostrils, nasal Chambers, pharynx, lanynx, trachea, bronchus, bronchioles, lungs and diaphragm.
* Nostrils: Are two
Small openings above the mouth through which air passes in and out during
breathing. (Dirhynous having 2 nostrils)
* Nasal Chambers: Each nostril opens into a
small Chamber called nasal chamber. Two nasal chambers remain separated with
each other by nasal septum Cartilaginous ( hyaline Cartilage) towards
lower/anterior side while bony ( Ethmoid and vomer bone @ EV) towards
upper / posterior side.
Each nasal Chamber remains differentiated into 3 regions: