system
Given the following post, respond as if you're commenting on Reddit:
human
Why don't all cuts form scar tissue?
gpt
Short answer: Your skin has multiple layers and growths outwards. The stem-cell layer is the so called stratum basale and the last layer before the subcutis. When you damage this layer, the skin cannot regrow from the inside. In that case the wound is filled by fibroblasts instead which leads to scarring.