Why do scars form after injuries?
Show answer & explanation
Answer: Collagen repairs in bundles
Collagen repairs in bundles ✓ — Correct! When skin is deeply wounded, the body rapidly produces collagen to close the gap. Unlike normal skin (collagen in random basketweave pattern), scar tissue lays collagen in parallel bundles—faster but less flexible. Scars lack hair follicles, sweat glands, and have different pigmentation. It's functional repair, not perfect regeneration!
Skin cells die permanently — Wrong. Skin cells don't die permanently—fibroblasts actively produce new collagen. Scars form because repair collagen is structured differently than original skin.
Infection leaves marks — Wrong. Scars form from any deep wound, with or without infection. The scar is from collagen repair tissue, not infection damage.
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