Lever: A stiff bar that rests on a support called a fulcrum.
Inclined Plane: A slanting surface connecting a lower level to a higher level.
Wheel and Axel: A wheel with a rod, called an axel, through its center
Pulley: A grooved wheel with a rope or cable around it.
Page 2: http://www.tryengineering.org/lessons/clipper.pdf
The middle part of the finger nail is called the nail plate. This is the section that is below the white part and above the lunula and cuticle.
The nail is part of the Integumentary System.
Nail plate
The visible part of the nail is called the nail plate or nail body. It is the hard, protective outer covering of the nail.
The only living part of the nail is the Matrix which is situated just below the cuticle.
lunale
The nail bed
the nail bed
The nail part refers to the the visible part of nails on fingers and toes while the nail bed refers to the skin beneath the nail plate.
No, It is the Matrix.
free edge
The distal edge of the nail is called the "free edge." It is the part of the nail that extends beyond the fingertip and is not attached to the nail bed. The free edge is typically the part that is trimmed during nail care.