Embryology: from Fertilization to Gastrulation, Animation

Teacher ~ on Instagram: "The human heart develops from mesoderm during early embryonic life and is the first functional organ, starting to beat by about day 22–23. Initially, two endocardial tubes form and fuse into a single primitive heart tube. This tube then bends and twists in a process called cardiac looping, which establishes the basic position of the future atria and ventricles. Next, septation divides the heart into four chambers. The atria are separated by the interatrial septum, and th