File:Heart Tube Fusion.jpg

From Embryology

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Early Human Embryo Heart Development

This is a ventral view of early human embryos between 20 to 22 days (GA week 5 to 6).

These bright-filed microscopy images show the early heart tubes fusing in the midline to form a single ventral primordial heart tube. This fusion event begins cranially and extends caudally.



Links: Week 4 | Carnegie stage 10 | Carnegie stage 11 | Tutorial - Primordial Heart Tube | Cardiovascular


Image Source: Scanning electron micrographs of the Carnegie stages of the early human embryos are reproduced with the permission of Prof Kathy Sulik, from embryos collected by Dr. Vekemans and Tania Attié-Bitach. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.

Embryonic Development


Cite this page: Hill, M.A. (2026, October 4) Embryology Heart Tube Fusion.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Heart_Tube_Fusion.jpg

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© Dr Mark Hill 2026, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current11:41, 14 March 2010Thumbnail for version as of 11:41, 14 March 20101,551 × 1,139 (125 KB)Z3212774 (talk | contribs)category:Heart ILP {{Template:SEM}} The primordial heart tubes fuse in the midline to form a single ventral heart tube. Fusion begins cranially and extends caudally.