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Figure 2

ID: ZDB-IMAGE-190723-2511
Source: Figures for Burkhard et al., 2017

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Figure Caption

Figure 2

Illustration of heart evolution. (A) Drosophila dorsal vessel and (B) Ciona heart with bilateral pacemaker structures. (C) two-chambered zebrafish heart with pacemaker ring at sinoatrial junction. (D) Four-chambered mammalian heart, primary pacemaker in the sinoatrial node (SAN). (A–C: anterior on the left, posterior on the right), Arrows indicate direction of blood flow. Red = myocardial/muscle layer; orange = endocardium; A = atrium; V = ventricle; SV = sinus venosus; BA = bulbus arteriosus.

Acknowledgments

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