This 3D model presents the human fetus at week 22 of gestation, showing well-formed lips, eyelids, and eyebrows, although the eyelids remain fused and the irises still lack most of their pigment. The visualization emphasizes the tooth buds developing beneath the gums and the lungs entering the late canalicular stage, when respiratory bronchioles and surrounding capillaries begin to form. Week 22 marks the start of the periviable period, making the model relevant for education on extreme preterm birth, neonatal counseling, and the limits of fetal viability.
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