What keeps your nails attached and how is it so strong?
In: Biology
Ungeal tissue, its a fibromatose like tissue that its made of colagen (mostly) and other stuffs. Its strong because its flexible, hurts a lot when its stressed and the nails themselves are just below bones resistence wise
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Extensions of your epidermis that just have excess keratin in them causing them to be hard and nail like as opposed to soft like skin
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Not sure about the term ‘fibromatose’, but this is my ELI5 answer:
The nail plate (commonly known as your ‘nail’), attaches to the nail bed (soft stuff underneath) which is composed of soft tissue called epithelium. This tissue is made of many layers, starting with a ‘basement layer’ and becoming more compact with each layer: this is where your Nail grows from. Even though it grows from the base of the nail bed, it is still connected through the ‘basement layer’ (just like all the rooms in a house are still connected to the basement in some form)
Nails don’t grow from beneath as other comments have stated they grow from the nail matrix which is behind the nail plate
The bone at the top end of your finger kinda looks like a truck bed. The Truck bed is filled with soft tissue that produce nail.
Think of it like putting a crane on top of a truck bed. It’s going to be hard as hell to pull the crane out of a truck bed. Sure the crane arm is weak as hell but the truck is immovable.
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So once you have hammered your nail very well in wood for example, friction arising from the surface of wood and surface of the nail stops it from sliding. This friction is static friction and is usually much higher than dynamic friction. This also explains why you can’t just put nails in any surface without a hammer , because you need to cross the coefficient of static friction by impulse generated by hammer.
Tldr friction
Because your nail has skin like strings to hold it down to the nail bed and your nail actually extends father back into your finger under your skin to hold it in
Actually like you’re 5
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