How old are children's lungs?

If the child is born normally, the lungs will basically develop at birth. If it is premature or congenital abnormality, it will slowly mature. However, the ventilation function of the lungs after birth is lower than that of adults. The lungs of children are more delicate. Therefore, special attention should be paid to the child's cold protection and warmth during infancy. once a cold is caught, pneumonia is more likely to form. In addition, children's vital capacity will continue to grow with age, more exercise can improve children's vital capacity, generally in the 20-year-old when vital capacity will no longer increase.