anatomy final Flashcards
what is the purpose of the thorax?
covers and protects major cardiopulmonary organs
angle of louis
the sternal angle
level of bifurcation of trachea into right and left main stem bronchi
how many true and false ribs?
1-7 are true
8-12 are false
11-12 are floating
where do you place a chest tube?
above the ribs to avoid trauma
what is the function of the lungs?
exchanges gases between air and blood
what is the homeostatic role of the lungs
regulates blood pH
regulates oxygen and carbon dioxide levels
what is external respiration?
exchange of gases in lungs
what is internal respiration?
exchange of gases within cells of the body
all cells require oxygen for metabolism and a means to remove carbon dioxide
conducting zone of the respiratory system
trachea
bronchi
bronchioles
respiratory zone of the respiratory system
respiratory bronchioles
alveolar ducts
alveolar sacs
what nerve innervates the lung?
phrenic nerve and vagus nerve
structures of the upper respiratory system
nose
mouth
pharynx
epiglottis
larynx
trachea
structures of the lower respiratory system
bronchial tree
lungs
sections of the pharynx
nasopharynx - posterior to nose
oropharynx - posterior to mouth
laryngopharynx - superior to larynx
what epiglottis?
lid or flap that covers that larynx and trachea so food does not enter the lungs
describe the trachea
windpipe
mucous membrane lining with cilia
c shaped cartilage rings
what do the bronchi terminate into
air sacs called alveoli
what are alveoli?
resembles a small balloon
CO2 diffuses from the blood and is exhaled
O2 diffuses form alveoli on inspiration
what is the parietal pleura?
outer most layer
inner surface of thoracic cavity and diaphragm
what is the visceral pleura?
inner layer
outer surface of the lung
intrapleural pressure
between 2 membranes
less than atmospheric pressure
how many lobes does the right lung have?
3
how many lobes does the left lung have?
2
where is the cardiac notch
only in the left lung