Questions about the integumentary system of vertebrates.
5
votes
3answers
185 views
Why does having cold hands hurt?
(1). Why does having cold hands create a painful sensation?
Is it a physical effect, maybe a protection mechanism from evolution?
(2). Why, if one's hands are cold, does it feel as if they are more ...
4
votes
1answer
39 views
Is there a scientific proof that smoking spoils face skin?
I saw that cigarettes-smokers (more than 3 cigarettes per day) often have the skin of the face which is a little bit spoiled.
Is there any scientific proof that cigarette smoke (or the nicotine ...
4
votes
1answer
69 views
How does skin healing work?
I stacked my bike and split my head right open. About three weeks later the scab falls off and the skin is sealed over, like magic! How does it all work? How does the brain know that part of the ...
4
votes
0answers
55 views
Functionality of vitamin A, Bx, C, D, E, K as used in cosmetics for the skin?
I was wondering if someone can compare the functionality of vitamin A, Bx (x means numbers, such as 1, 2, 3, ...), C, D, E, K in the skin? They are used in cosmetics but what is their actual effect?
...
3
votes
0answers
32 views
What percentage of human capillaries are located in the skin?
As in the subject line, what percentage of capillaries in a human (expressed in terms of total length, I suppose) are located in the skin, as opposed to internal organs? Google scholar has not turned ...
2
votes
1answer
71 views
Why does the sweat of children not smell like adults?
My kids sweat plenty in this hot heat, but they don't smell afterward. I on the other hand need all kinds of deodorant. Why doesn't kid sweat smell?
2
votes
1answer
48 views
How long does a tan last?
How long do melanocytes and melanosomes continue to protect DNA after UV exposure? Basically, if skin is tanned, then over the next month it is shed, will melanocytes continue to produce high levels ...
1
vote
1answer
52 views
Relation between goose bumps and temperature
As we all know, cold weather will cause us to have goose bumps. I honestly don't know why (1), because our skin contracts?
Apart from that something quite contradicting happened this morning. I was ...
1
vote
2answers
40 views
Why can silicone reduce keloid?
I heard people use silicone sheet for reducing raised scars (i.e., keloids). I was wondering what is the rational behind it, and whether it actually works.
