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. 2009 Apr 20;13(5):866–886. doi: 10.1111/j.1582-4934.2009.00758.x

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(A) and (B) Electron micrographs on serial sections show an ICLC (blue coloured) with two processes (arrowheads) which hold two cardiomyocyte progenitors (CMP, brown). Note close contacts of one ICLC process (ICLCp) with a macrophage (M). (B) – A basal lamina – like material surrounds an ICLC process (small arrows in the upper left corner). Leptomeric fibrils (arrow) connect the primitive intercalated disk with the plasma membrane. Cap – capillary.