system
Given the following post, respond as if you're commenting on Reddit:
human
If muscle cell never divide, how does people become muscular ? How do they build muscle ? How does a child grow?
gpt
Skeletal muscle cells do not divide, but there are precursor cells that can turn into new muscle cells. Those precursors are capable of dividing, though in an adult they're usually just resting.

In addition, an existing skeletal muscle cell will be able to grow in size without dividing.