#long_bone__os_longum  in vertebrate animals: a long cylindrical marrow-containing bone of a limb
  supertype:  bone__os  rigid connective tissue that makes up the skeleton of vertebrates
  part:  endosteum  metaphysis
  subtype:  epiphysis__epiphysi  the end of a long bone; initially separated from the main bone by a layer of cartilage that eventually ossifies so the parts become fused
  subtype:  diaphysis__diaphysi__shaft  the main (mid) section of a long bone
  subtype:  arm_bone__armbone  a bone in the arm
     subtype:  humerus__humeru  bone extending from the shoulder to the elbow
     subtype:  radius.arm_bone__radiu  the outer and slightly shorter of the two bones of the human forearm
     subtype:  ulna__elbow_bone__elbowbone  the inner and longer of the two bones of the human forearm
  subtype:  leg_bone__legbone  a bone of the leg
     subtype:  femur__thighbone__femoris__femori  the longest and thickest bone of the human skeleton; extends from the pelvis to the knee
     subtype:  fibula__calf_bone  the outer and thinner of the two bones of the human leg between the knee and ankle
     subtype:  tibia__shinbone__shin  the inner and thicker of the two bones of the human leg between the knee and ankle

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