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6 votes

Why do obese people heal more slowly?

It's well known that obese patients have slower wound healing, but the specific cause isn't known; most likely there are multiple causes acting together. The correlation between obesity and ...
iayork's user avatar
  • 14.3k
6 votes

If cells regularly renew, why do we have scars?

Scar tissue formation is part of the normal healing process in which fibrous material braces and pulls the wound together, in other organisms (and young mammals) this process is mild and just serves ...
John's user avatar
  • 14.7k
5 votes

Which processes in the human body depend on natural selection among cells?

Arguably T cell maturation in the thymus is such a process.
Armand's user avatar
  • 1,721
4 votes

Cartilage regeneration

The reason that cartilage rarely is able to regenerate is that it is poorly vascularized and innervated. It doesn't have its own blood supply to deliver signaling molecules that promote regeneration ...
akaDrHouse's user avatar
  • 1,309
4 votes

Do scars generally continue to undergo beneficial changes after maturation?

The collagen that holds together scar tissue is continuously degraded and replaced. (Plastic and Reconstructive Surgery, 1976) If collagen synthesis slows down, due to scurvy for example, old wounds ...
timeskull's user avatar
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3 votes

Is collagen supplementation useless?

Regarding the use of collagen supplements to help prevent or treat a tendinopathy: A rather inconclusive quote from a 2016 systematic review {1}: glucosamine and chondroitin sulphate, vitamin C, ...
Franck Dernoncourt's user avatar
1 vote

Why do we get scars?

Scars are fibrous tissue that is left after an injury. The body does its best to fix a body part after an injury and scars are their best attempt at doing so. It would be pleasant to think we could ...
Remi.b's user avatar
  • 68.2k

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