pulmonary circulation Flashcards
what are the two pulmonary vessels
pulmonary artery and bronchial artery
function of bronchial artery
to carry oxygenated blood to lung musculature
how many branches does pulmonary artery have
two
where do the bronchial artery arise from
descending thoracic aorta
where do right and left bronchial arteries open
azygous vein and superior hemiazygous vein
where does blood from distal portion of lung drain
pulmonary vein
what is a shunt
a diversion through which arterial and venous blood mix
two components of physiological shunt
- opening of bronchial vein into pulmonary vein
- thebesian vein opening into cardiac chambers
what is mixing of oxygenated and deoxygenated blood called
venous admixture or venous waste
what is analogous to physiological shunt (blood waste)
physiological dead space( air waste)
difference between pulmonary and systemic vessels
- thinner
- larger capillaries
- more elastic or distensible
- less developed muscular ling
- less resistance
- have physiological shunts
- low pressure vessels
why are pulmonary vessels low pressure
because they are highly elastic
pulmonary capillary pressure
7mm of hg
pulmonary blood flow
5 L/ min
shunt volume
1-2%
