The brain's weight increases during early childhood,as its mass increases.What constitutes this increased mass?

Name: The brain's weight increases during early childhood,as its mass increases.What constitutes this increased mass?
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The increased mass of the brain during early childhood is due to both the growth of new dendrites, which enhance the connections between neurons, and the development of the myelin sheath around neural axons, which improves the speed and efficiency of neural transmissions.

The Brain's Weight Increases During Early Childhood,as Its Mass Increases