Anatomy Flashcards

1
Q

3 main important shunts in foetal circulation

A

ductus venosus (shunts oxygenated blood from umbillical vein to IVC to bypass liver)

foramen ovale (shunt oxygenated blood from right to left atrium)

ductus arteriosius (shunts deoxygenated blood from pulmonary artery to inferior aorta)

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2
Q

how do the shunts in the foetal circulation change on birth

A

when they take their first breath, this decreases pulmonary resistance – increases left atrial pressure = closure of foramen ovale
increase in 02 from respiration + reduced prostalandins from placental separation = closes ductus arteriosus

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3
Q

post natal derivative of umbillical vein

A

round ligament (ligamentum teres hepatis)

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4
Q

post natal derivative of umbilical arteries

A

medial umbilical ligament

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5
Q

what layers does the pericardial space lie

A

between the parietal pericardium and epicardium

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6
Q

what neve supplies the pericardium

A

phrenic nerve

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7
Q

why does pericarditis cause referred pain to the shoulders

A

its supplied by the phrenic nerve

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8
Q

damage to what artery causes heart block or arrythmias and why

A

right coronary artery as it supplies the SA and AV node

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9
Q
A
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