Nut

The nut is a nut. It is produced by the walnut tree in the family Juglandaceae, originally present on the Eurasian continent and Africa. On the botanical fruit of the walnut is a drupe, fleshy fruit kernel, whose thick, the husk is inedible. The nut is actually the core of this dry drupe.
The nut is in the form of a shell or shell, which is lignified endocarp. This shell, which measures four to five centimeters long and three to four centimeters wide, separates into two and has at its summit a mucro more or less accentuated. The kernel consists of two kernels having convolutions which resemble the human brain, separated by a thin membrane called the mesocarp. The separation membrane that divides the inside of a nut called the "peel", and each district defined by the nuts zest is called a "leg".