skin

It's been a while I'm out of ideas what to write.

Didn't realise that skin is actually the biggest organ in human body. It can protect from 'enemies' as small as the virus to as big as an elephant(>.uhm, not only that the skin itself is the physical barrier, it also has it's own soldier (known as Langerhan cells), & soldier in disguise (the keratinocyte, which made out our skin also make a substance that involve in skin protection) (hah?!)

But the skin has it's limit.. It cannot hold on (like iron man or superman) external injuries that will kill the cells of skin, such as fire.. This is where burn injury comes in. Just like burning the paper, skin will also become black! But skin has it's own programme to regenerate. It's not an easy job, though - first it has to recruit all unit of developer & not all developer can attend at the same time. Some need to be call using 2nd messenger, some need to undergo severel procedure, ... Those who arrive first will gather themself & done their work - 'piling', 'knitting', 'building the pillar', 'make the cement', 'stack the bricks'. Depend on the depth & area of damage, it takes time to complete the temporary skin. If the damage area are not so deep, the skin cells will able to make a new skin & replace the area like nothing is happen. But if the area was quite large, & really deep & heavy damage, the skin cell still replace it but the effect is still there.. we know it as 'scar'..