At both ends of a long-bone there would be a bearing shaped protuberance called a 'ball', as in one half of 'ball and socket'.
The straight part in the middle, away from both ends of the bone
The shaft of a long bone- diaphysis The head(s) of a long bone- epiphysis
The head of the long bone is called the Epiphyseal.The long bone constists of a diaphysis and an epiphysis. The ends are epiphysis and the shaft is diaphysis.
Epiphyses. (Diaphysis is the middle part). You might also be asking the name of the knobby parts on the ends, which articulate with the next bone and make up the joint: those are 'condyles'.
Diaphysis
diaphysis
An epiphysis is the end of a long bone (the head) whereas the diaphysis is the shaft of the long bone. These two sections are connected by what's called the mataphysis (the widening of the bone towards the head).Epiphysis is an expanded portion at the end of the bone. Diaphysis is the shaft of the bone.
Medullary cavity
The diaphysis houses bone marrow.
The Diaphysis houses bone marrow for the body.
The major anatomical areas of a long bone are: The Diaphysis - The long, slender shaft of the bone that is composed of compact bone and houses the medullary cavity. The Epiphysis - The ends of the bone that are composed of spongy bone. This area is also the location of the growth plates.
Long bones have a shaft (also known as the body or to osteopaths the diaphysis) is the central portion, between the ends.