While playing soccer, Allen falls and scrapes his knee. Over time, the wound on his knee heals. How does this happen?
Select one:
Cells from blood flood the damaged area and become different cells.

Cells in the damaged parts become larger and eventually become large enough to cover the wound.

Cells in the damaged parts divide and produce more cells by undergoing mitosis.
Cells grow in different parts of the body and then arrive at the damaged part through blood.