When a cell is in a hypertonic solution, water is leaving the cell and the cell starts to shrivel up. It gets smaller than its average size.
Answer:
The thymus
Explanation:
It is the most active and starts making T-cells before you are even born. After puberty the thymus shrinks and is replaced with fat.
I think this is because the molecules in the rock are so small. The rock is also a solid.
