The 3D visualization reveals the human fetus at week 23, with skin that appears reddish, wrinkled, and translucent because subcutaneous fat is still scarce. The model shows a lean but increasingly proportionate body, while internally the lungs develop a denser capillary network and the first surfactant-producing cells, and rapid eye movements begin to appear. Survival outside the uterus becomes possible at this stage with intensive neonatal care, so the model is valuable for explaining the anatomical challenges faced by extremely preterm infants.
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