The evolution of the human heart! - We created this video showing the development of the human heart, starting from day 20, when the first primitive tube begins to beat. Over the following weeks, the heart loops, partitions, and rapidly grows more complex. By around day 70 (week 10), it has reached its fully developed four-chambered form, complete with visible blood vessels. This visualization highlights each stage leading to the final structure—showing the aorta, pulmonary arteries, ventricles,