MC

The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm.
they are all tubular bones,with round distal articulate surfaces (heads) and more squarish proximal ends (base).
all of the four carpals in the distal row articulate with one or more metacarpal bases:
Trapezium =MC1 + MC2
Trapezoid = MC2
Capitate= MC2+MC3+MC4
Hamate= MC4+MC5
{first MC= Thumb}

each MC except MC1 ossifies from 2 centers : 1- shaft (body) + base
: 2- distal extremity (head)
MC1 (thumb) :seprate center for it base (not distal extremity)

MC2-5 could easily be confuse with MT 2-5 :
metatarsal shafts are larger in diameter relative to lenght
metacarpal heads are more rounded than the mediolaterally compressed metatarsal heads.