Each organ has a unique developmental timeline and process:
Brain: Brain development begins in the embryonic stage and continues well into early adulthood. Critical periods of growth occur in the first three years of life, making early childhood a crucial time for cognitive development. Heart: The heart begins to form in the third week of pregnancy and is fully functional by the end of the eighth week. Postnatally, the heart grows in size and strength to meet the increasing demands of the growing body. Lungs: Lung development starts in the embryonic stage but continues postnatally. The lungs are not fully mature at birth and continue to develop alveoli and capillaries after birth, especially in the first few years of life. Liver: The liver starts forming in the embryonic stage and plays a critical role in metabolism and detoxification. It continues to grow and mature throughout childhood. Kidneys: Kidney development begins in the embryonic stage and continues postnatally. Kidneys mature significantly after birth, reaching full functional capacity in early childhood.
