Chapter 2 (Part 1) Flashcards
The respiratory system is composed of
upper and lower respiratory tracts
movement of air in
and out of the airways
Ventilation
warms and filters inspired air
upper respiratory tract or upper airway
accomplish gas exchange or diffusion
lower respiratory tract
involves delivering oxygen to the tissues through the bloodstream and expelling waste gases, such as carbon dioxide, during expiration
Gas exchange
Upper airway structures consist of the
Nose
Paranasal Sinuses
Pharynx
Tonsils
Adenoids
Larynx
Trachea
passageway for air to pass to and from the lungs
Nose
It filters impurities and humidifies and warms the air as it is inhaled
Nose
include four pairs of bony cavities that are lined with
nasal mucosa and ciliated pseudostratified columnar epithelium
Paranasal sinuses
Paranasal sinuses
Frontal
Ethmoid
Sphenoid
Maxillary
Common site of infection
Sinuses
is a tubelike structure that connects the nasal and oral
cavities to the larynx
Pharynx or Throat
Three regions of pharynx
Nasal
Oral
Laryngeal
encircle the throat. These structures are important links in the chain of lymph nodes guarding the body from invasion by organisms entering the nose and the throat
tonsils, the adenoids, and other lymphoid tissue
functions as a passageway for the respiratory and digestive tracts.
Pharynx