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Respiratory System (Disorders of the respiratory system (Lung cancer: 1/3…

- - - - Olfactory receptors ( connected to olfactory bulb) (sense of smell) located in mucosa on superior surface
    - - Cavities within bones ( lighten the skull, produces mucus)
    - - Air enters nose through external nares (nostrils) and nasal cavity (inferior of nose) divided by nasal septum
    - - Muscular passage from nasal cavity to larynx
        Three regions of pharynx:
        Nasopharynx: superior region behind nasal cavity (passage of air only)
        Oropharynx: middle region behind mouth
        Larayngopharynx: inferior region attached to larynx
  - - - Rigided because of the c-shaped rings made of headline cartilage to keep airway open at all times
    - - Primary bronchi goes into smaller and smaller branches, right bronchus is wider, shorter, and straighter, and left is different due to the presence of the heart on the left side
    - - commonly called the voice box, is an organ in the top of the neck involved in breathing, producing sound and protecting the trachea against food aspiration. The larynx houses the vocal folds, and manipulates pitch and volume, which is essential for phonation.
    - - Mainly in the thoracic cavity (rib cage), apex near clavicle, base rests on diaphragm, each lung divide into lobes by fissures (3 fissures on the right and 2 on the left)