Changes

An '''arm''' is a particular upper [[limb]] appendage having varying usage and strength within the animal kingdom.  In humans it is made up of three distinct [[bone]]s:

An '''arm''' is a particular upper [[limb]] appendage having varying usage and strength within the animal kingdom.  In humans it is made up of three distinct [[bone]]s:

* Humerus:  (upper arm)

* Humerus (upper arm)

* Radius: (outer bone of the forearm, when supinated)

* Radius (outer bone of the forearm, when supinated)

* Ulna: (inner bone of the forearm, when supinated)

* Ulna (inner bone of the forearm, when supinated)

The hands have these bones:

The hands have these bones:

* Carpals: ("wrist bones,"  

* Carpals ("wrist bones")

* Metacarpals: (longer bones in the "palm")

* Metacarpals (longer bones in the "palm")

* Phalanges: (s. phalanx; two in the pollex, or thumb; three four the remaining four fingers)

* Phalanges (s. phalanx; two in the pollex, or thumb; three four the remaining four fingers)

The upper region of the arm has the following muscles:

The upper region of the arm has the following muscles:

The forearm has these muscles:

The forearm has these muscles:

* Brachioradialis (connects

* Brachioradialis (connects)

* Supinator (turns forearm up)

* Supinator (turns forearm up)

* Pronator quadratus (turns forearm down)

* Pronator quadratus (turns forearm down)