Yes. The outside layer is dead, but when they fall off, it's replaced by the skin underneath it.
The human skin is not replaced every 40 days. It is believed that the skin is replaced on average every 35 days.
Yes
its called a skin graft
Skin because it has to be continuously replaced.
Well, after a daily bath or shower and you dry yourself you see tiny crumbles of skin coming off...that is the proof of your old/dirty/worn out, skin coming off to be replaced by new ones....
2
Skin can be grown back. They may require skin grafts and other surgeries if they are very severe.
Lungs heart liver eyes skin and kidneys
Replaced
Because we are constantly shedding dead skin cells so they need to be replaced.
Yes. Sea otters shed their fur and it gets replaced by new fur throughout the year. It is similar to how humans shed their old/dry skin and gets replaced by new skin. While in other animals it is known as molting.
sex