Description

Explore the fourth week of embryonic development with this high-resolution 3D model. It illustrates early organogenesis, neural tube closure, and somite formation, along with the initial development of the heart and major blood vessels. Limb buds and pharyngeal arches are visible, showing the first signs of external human form. This model allows learners to appreciate how rapid morphogenetic changes establish the groundwork for functional systems, making this stage one of the most dynamic in early development.