Blood Flow (pg 1) Flashcards
where does blood flow from the upper extremity go
SVC (superior vena cava)
where does blood from the lower extremity go
IVC (inferior vena cava)
what is the exception for blood drainage
Azygous vein drains lumbars in SVC
if IVC ever got blocked this could take over-detour
within the right atrium how much blood passively flows into the right ventricle
80%
within the right atrium how much blood needs atrial contraction
20%
where does the P wave start
at SA node in Crista Terminals of R atrium
where does the SA node impulse travel to
AV node
what is the AV-nodal delay
SA node impulse to AV node and delayed (P-R interval)
allows time for last 20% of blood to get into the right ventricle
how many ml are in the right ventricle at the end of diastole
120
what sound is made when the tricuspid valve closes within the right ventricle
S-1 heart sound
what type of contraction is occurring when the tricuspid valve closes
isovolumetric contraction
what happens when the ventricle contracts
ventricular depolarization
QRS complex
when does the pulmonary artery open
mid systole
enough pressure to blow open the pulmonic semilunar valves
how does blood leave the right ventricle
exits via two pulmonary arteries to lungs
what type of blood do the pulmonary arteries carry
DE-oxygenated blood
what is the pulmonary artery in a fetus
umbilical artery
how does the blood get oxygenated in the lungs
Bohr effect
how many O2 molecules to a hemoglobin
4
how much hemoglobin is saturated with O2
97%
how does blood exit the lungs
4 pulmonary veins into left atrium
where is the highest O2 in cardiac system
pulmonary veins
what type of blood do the pulmonary veins carry
oxygenated
what is the pulmonary vein in a fetus called
umbilical vein
how much blood passively flows into left atrium
80%
