Humans shed their skin every 25-45 days and we have a brand new layer of skin. yes, it's true! starting in our stratum basale, new cells replace old cells (through continuous mitosis) and push old. According to recent research, humans shed their epidermis at the rate of 0.001 - 0.003 ounces of skin flakes every hour. that is roughly 0.024 - 0.072 ounces per day and 9-27oz/year, or 0.55 - 1.6 pounds per year. according to the who, 70 years was the average life expectancy at birth of the global population in 2012.. Later, the melanocytes migrate to the upper skin and are shed with the keratin cells, that's why the tan is lost. darker skin means more melanin in the melanocytes..
It turns out, your body's immune system tries to get rid of the ink under your skin, but in the process, it makes those marks permanent, as this video from ted-ed explains.. Humans shed about 600,000 particles of skin every hour. this is about 1.5 pounds a year. by age 70, the average person will have lost 105 pounds of skin in their lifetime.. When skin is too dry, the enzymes that degrade desmosomes cannot function properly, which leads to clumps of cells that shed together, instead of single cells that shed invisibly. these clumps can be seen as flakes or scales..
No comments:
Post a Comment