Quicktime Historic Animation - Heart 02

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• Heart Historic Movie 2

<Flowplayer height="260" width="320" autoplay="false">Heart_historic_002.flv‎</Flowplayer>

Sinus venosus - draining fluid and blood cells from 3 pairs of vessels (vitelline veins, umbilical veins, common cardinal veins) common cardinal veins = ducts of Cuvier (Scale bar 1 mm) Heart tube - bends ventrally to the right Caudal to cranial sequence: sinus venosus - primitive atria - conus - truncus arteriosus - aortic arches Middle Week 3 (Gestational Age - week 5) Splanchnopleuric mesoderm - differentiated into epimyocardial mantle around the tubes Two heart tubes - brought together by the folding of the body Foregut - lies dorsal to the heart tubes End Week 3 Spontaneous cardiac contractions Detachment of the heart tube dorsally Primordia of transverse sinus of the pericardium Next: Part 3