morphogenesis of an epithelium | pattern specification process | epithelial tube morphogenesis | heart morphogenesis | determination of left/right symmetry | tissue development | epithelium development | determination of heart left/right asymmetry | tube morphogenesis | embryo development | system development | multicellular organism development | determination of bilateral symmetry | embryonic heart tube morphogenesis | animal organ morphogenesis | heart looping | chordate embryonic development | heart development | embryo development ending in birth or egg hatching | embryonic morphogenesis | embryonic organ morphogenesis | tissue morphogenesis | embryonic heart tube development | anatomical structure development | embryonic organ development | animal organ development | anatomical structure morphogenesis | developmental process | tube development | circulatory system development | multicellular organismal process