Each individual metacarpal is made of a base, shaft along with a head. The medial and lateral surfaces on the metacarpals are concave, allowing attachment from the interossei muscles. The scaphoid is at distinct hazard of avascular necrosis after fracture as a consequence of its so-identified as ‘retrograde blood source’ https://www.theorthopaedicandpainpractice.com/what-are-the-different-bones-found-in-my-hand/