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CH.22 - Respiratory System
Terms in this set (10)
What is Pulmonary respiration?
gas exchange between the pulmonary circuit and the lungs
What is the difference between respiration and ventilation?
-Respiration: exchange of gas molecules (specific molecules of air)
-Ventilation: Movement of air in/out of lungs
What is the pathway air takes from face to gas exchange site?
Nostril -> Nasal Cavity/Oral cavity -> pharynx -> larynx -> Trachea -> Carina -> L/R main bronchus -> L/R lung -> Bronchioli -> bronchi -> alveoli -> capillaries
What two structures not directly apart of oxygen pathway contribute to ventilation?
- Rib cage
What structures aid in filtering, warming, and mixing of air?
- Filtering: Nostril, nasal cavity (mucus), Palatine/lingual tonsil, epiglottis
-warming: Nasal cavity and sinus cavities
- Mixing: Nasal conchae + nasal Meatus
what is beneficial about the right lung having 3 lobes compared to the left lungs 2?
It increase surface area -> more alveoli and more gas exchange
What are the two zones in the pathway of oxygen? Where does each start/end
- Conducting zone + Respiratory zone
-Terminal bronchiole -> Respiratory bronchiole + alveoli
What structure of the alveoli stretches during inhalation and recoils during exhalation for gas exchange?
elastic fibers in each alveolus
What type of cell makes up the alveolus and how does this aid in respiration/
-Type 1 cell : simple squamous epithelium
-Has pores for O2 to pass through
What cell aids in ventilation, and is a part of the structure of an alveoli? What does it secrete and what does this do?
-Type II cell: surfactant secreting cell
-Surfactant interferes with water molecule's binding ability (decreases surface tension)
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