Keratin
which is a protein that makes the skin waterproof
Collagen
keratin
they produce a fibrous protein that gives the skin its protective properties.
hair is not made of cells. it is made of a protein called keritin. hair folical cells make the keritin, but stay within the epithelium (or skin) of the mammal.
Insulin is not produced by skin cells.
Why wouldn't they? The skin cells on the soles of your feet are just like the skin cells everywhere else on your body - the skin on the soles of your feet would look identical to skin anywhere else if not for the fact you walked on them, which hardens the flesh. But, yes, they have nuclei.
which is a protein that makes the skin waterproof
Keratin
Collagen
Nails are made of up the protein called keratin, which is a tough and insoluble structual protein. It is basically dead skin cells.
Keratin is a tough, waterproofing protein. Keratin is secreted by the cells of the epidermis (the outermost layer of skin).
Epidermal cells.
keratin
Collagen
Most all the parts of our bodies are made from protein: hair, skin, blood, organs, and muscles. It is needed for cells to grow. It also repairs or replaces healthy cells and tissues.
Because your blisters pop and the skin hardens up