File:Heart Looping Sequence.jpg

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The Sequence of Events in Heart Looping

Week 4 to week 5 (GA 6 to 7 weeks)

  1. The heart begins as a straight tube then bends ventrally.
  2. Rotation brings the bulge of the ventral bend (predominantly the bulbus cordis and ventricle) to the right, forming a "C-shaped" loop (sometimes called "U-shaped").
  3. As the atrium is brought cranially, the poles of the heart converge. The heart now appears as an "S-shape", with the first bend in the S between the bulbus cordis and ventricle and the second bend between the atrium and sinus venosus.
  4. The bulbus cordis and arterial trunk move ventral to the atrium to form the later outflow tract. The atrium now lies superior to the ventricle.


Intermediateicon.jpg
Begin Intermediate: Primordial Heart Tube  Heart Tube Looping  Atrial Ventricular Septation  Outflow Tract  Heart Valves  Cardiac Abnormalities  Vascular Overview



Cite this page: Hill, M.A. (2019, July 17) Embryology Heart Looping Sequence.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Heart_Looping_Sequence.jpg

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© Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current10:49, 14 March 2010Thumbnail for version as of 10:49, 14 March 20101,548 × 577 (85 KB)Z3212774 (talk | contribs)category:Heart ILP Shows the sequence of events in heart looping. The heart begins as a straight tube then bends ventrally. Rotation brings the bulge of the ventral bend (predominantly the bulbus cordis and ventricle) to the right, forming a C-shaped
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