Compléter Activity 3Version en ligne Identify the characteristics of the five shapes used in the classification of bones. par Kristani Cochran 1 sesamoid spongy cavity yellow Short patella compact red endosteum irreuglar medullary marrow diaphysis longbones flat perosteum long Bones that are generally greater in length than in width are considered . The is a long cylindrical structure which forms the main shaft of the bone . The central part of this is hollowed to form the or . There are two types of bone marrow : and . Furthermore , bones are formed of two thin plates of covered compact bone , separated by a thin layer of covered spongy bone . bones are generally equal in width and length and mainly composed of bone covered by a thin layer of bone . The bones that are elaborate in shape and can't be classified into any other category are considered bones . Lastly , bones formed within tendons of some muscles as these tendons pass over joints are called bones , for example , the .