Flashcards in Respiratory System Deck (20):
1. air passageway: conducts air into body or out
2. site of gas exchange
3. detection of odors: contains olfactory epithilium
4. production of sound: sound created as air moves past vocal folds
upper respiratory tract
nose, nasal cavity, pharynx
Lower respiratory tract
larynx, trachea, bronchi, bronchioles, alveolar ducts, alveoli
passageway serves for conduction air, nose to terminal bronchioles
structures participate in gas exchange, respiratory bronchioles, alveolar ducts alveoli
mucus, goblet cells, ciliated epithelium, basement membrane, lamina propria
smaller as it moves down.
Thyroid, cricoid carilage, cuneiform, corniculate (horns), arytenoid
type 1 cells: SSE cells make up wall, Type II cells, produce surfactant (increase surface area keeping alveoli inflated.)
Alveolar macrophages: resident phagocytes
Respiratory membraneL surface across which gas exchange occurs
SSE of alveoli SSE of capillary and shared membrane
as V decreases, pressure increases. move from areas of high to low pressure.
pressures in lungs
intrapleural pressure: pressure i pleural cavity.
atmospheric pressure: all gases in atmosphere
Intrapulmonary pressure: changes throughout pulmonary ventilation
inspiration: change in volume and change in pressure, air rushes in
expiration: decrease in volume, change in pressure, air rushes out.
Alveolar gas exchange
O2 moves from high in alveoli to low in blood and CO2 moves from big in blood to low in alveoli
systemic gas exchange
CO2 moves from high in tissue to low in capillaries, O2 moves from high in blood to low in tissues.
2% free in blood
98% on heme of hemoglobin in RBC
70% transported in blood as carbonic acid
20-25% transported on globin on hemoglobin
5-10% free in blood
Ventral repiratory group
sets pace for normal breathing
Dorsal respiratory group
alter reparation based on needs from body on the VRG (in response to tissue demands)