Historic Animation - Heart 03

From Embryology
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File:Heart_historic_003_icon.jpg</wikiflv> Four separate shifts of cardiac position

Week 4 (Gestational Age - week 6)

  • Shift 1 - Head fold growth rotates heart and cavity 180 degrees
  • Shift 2 - Curvature of the body, cephalic growth

Week 5 (Gestational Age - week 7)

  • Shift 3 and 4 - Growth of the liver

Week 4 - First aortic arches declining, Third arches well developed

  • Myogenic contractions sufficient to circulate blood
  • Atrium migrates to higher location

Week 5 - Ventricles do not contract simultaneously

Week 6 - Separation of outflow has begun

Next: Part 4