Quicktime Historic Animation - Heart 04

From Embryology
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<Flowplayer height="260" width="320" autoplay="false">Heart_historic_004.flv‎</Flowplayer> Week 7 - (outflow) aortic and pulmonary trunks completely separated

Week 8 - external form similar to that at birth, total embryonic heart growth - 0.5 mm to 5 mm growth

Week 4 - Dorsal view, Sinus venosus migrates towards the right

End of week 4 - fourth arches appear, sinus venosus single opening into atria

Week 5 - branched pulmonary vein arises, hepatic part of inferior vena cava (IVC) developing within liver, right pulmonary arch declining to disappear

Week 6 - pulmonary branches taken up by left atrium

Week 7 and 8 - superior vena cava (SVC) migrates upwards

End of Week 8 - coronary sinus, draining veins of cardiac wall

Week 11 - 4 secondary pulmonary branches have openings into the left atrium

Next: Part 5