Description of a hand

The hand is an organ of the human body placed to the extremity of the arms.
It is constituted by bones and cartilages that shape five fingers in every hand.
In addition, it is constituted also of the palm that is softer and smooth, it fills completely of different lines in every subject.
Nevertheless, if that there are similar lines in all the hands: the line of the life and the line of the future. Returning to the fingers we can see that are formed for little bones joined by conjunctions called joints to give mobility.
In addition to the top part of every finger the nails are situated.
The nails are basically calcium and sometimes, when the body lacks calcium, a few white little lines appear.
Then, the hand is a curious organ since it is totally lined and constituted of small parts that do an everything.