The developments of the human hand are refined by two arrangements of muscles

history channel documentary What is a hand? Underneath we cite from the Funk and Wagnall's Encyclopedia that clarifies this comprehensively:The hand is disclosed to be a,"terminal bit of the arms or foremost appendages of people and different primates, particularly adjusted for getting a handle on. The getting a handle on members of different well evolved creatures and lower types of creatures are infrequently called hands so as to recognize them from the feet of the rear appendages, yet genuine hands seem just in the primates.

"Externally the hand comprises of an expansive palm connected to the lower arm by a joint called the wrist. At one side and at the external edge of the palm are five digits, the thumb and four fingers. The thumb in people is verbalized with the goal that it can be conveyed inverse to the fingers and hence be utilized for getting a handle on little questions. The fingers themselves can be collapsed forward over the palm for the holding of items. The main contrast between the hands of people and those of alternate primates is that the thumbs of the last can't be against the fingers."The human hand has 27 bones: the 8 bones of the carpus, or wrist, orchestrated in two lines of four; the 5 bones of the metacarpus, or palm, one to every digit; and the 14 computerized bones, or phalanges, 2 in the thumb and 3 in every finger. The carpal bones fit into a shallow attachment shaped by the bones of the lower arm.

"The developments of the human hand are refined by two arrangements of muscles and tendons: the flexors, for twisting the fingers and thumb, and the extensors, for rectifying the digits. The flexor muscles are situated on the underside of the lower arm and are appended by tendons to the phalanges of the fingers. The extensor muscles are on the back of the lower arm and are also associated. The human thumb has two separate flexor muscles that move the thumb in resistance and make getting a handle on conceivable."