Neither brain nor the Muscles
Well because it is not used to anything yet and a new area the outcome will most likely be a super SLOW growth if it grows at all
Answer:
Cell Theory
✓ All living things are made up of cells
✓ Cells come from other cells
✓ Cells are the smallest living part of a living thing
✓ Cell function to keep the cell, and the organism, alive
The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.