respiratory system Flashcards
surfactant
fluid lining alveoli that prevents their collapse
conchae
three projections arising from the nasal cavity walls to increase surface area
inhalation
active phase of pulmonary ventilation
internal exchange
the phase of respiration where oxygen is carried to cells by circulating blood
oropharynx
portion of the pharynx located posterior to the mouth
nasopharynx
uppermost portion of the pharynx posterior to nose
pulmonary ventilation
the process by which air is obtained from the environment and delivered to the alveoli
apnea
temporary cessation of breathing
cheyne-strokes
rhythmic variation in the depth of respiratory movements alternating with period of apnea and seen in critically ill patients
hypoxia
lower than normal level of oxygen in blood
chemoreceptors
areas in the carotid artery and aorta that regulate breathing
glottis
space between two vocal chords, opening to trachea
pleura
membrane around each lung
tracheostomy
hole made in trachea by surgical procedure
hypercapnia
high level of carbon dioxide