Compact Bone: Compact bone is the non-cancellous portion of a bone, which largely consists of closely packed osteons and forms the hard exterior of the bone. While compact bone appears at first glance to be solid and uninterrupted, closer inspections reveals that the osseous tissue only makes up from 70-95% of the available volume. Compact and spongy tissues in a flat bone. The compact bone gets its white, smooth structure owing to the connective tissues that cover around ¾ part of the bone from inside. They make up the long bones in the body. The small dark ovals in the osteon represent the living osteocytes. Spongy bone and compact bone make up the long bones of the human skeleton.Long bones are longer than they are wide, like the tibia and the femur. There are pores and spaces even in compact bone. The difference between spongy and compact bones is given below in a tabular column. CliffsNotes study guides are written by real teachers and professors, so no matter what you're studying, CliffsNotes can ease your homework headaches and help you score high on exams. The inner layer of bones consists of spongy bone tissue. The compact bone is the main structure in the body for support, protection, and movement. (credit: modification of work by NCI, NIH) The shafts found in long bones are also compact bones. Spongy bone is used for more active functions of the bones, including blood cell production and ion exchange. Spongy bone contains red bone marrow that is used in erythropoiesis. However, compact bones also serve a function in storing and … Compact bone appears solid and spongy bone consists of a web- or sponge-like arrangement of solidified extracelluar matrix. Compact bone stores yellow bone marrow, which is composed primarily of fat, in its medullary cavity. Long bones are dense hard bones that provide strength, structure and mobility. While compact bone is denser and has fewer open spaces, spongy bone is ideal for making and storing bone marrow within the lattice-like trabeculae network. Due to the strong nature of compact bone, compared to spongy bone, it is the preferred tissue for strength. Cancellous bone can develop into compact bone through the action of bone-forming cells called osteoblasts.It is in that manner that all long bones develop in the embryo.The osteoblasts deposit new bone matrix in layers around the trabeculae, which thus … Spongy Bone: Spongy bone is the osseous tissue, which fills the interior cavity of bones, consisting of … In addition to long bones, the four other types of bones in the human skeleton are short bones (the tarsal bones of the wrists and feet), flat bones (skull, rib cage, sternum, scapula), sesamoid bones (knee cap) and irregular bones (). These bones are tough and hard with negligible gaps inside them. This quiz has tags. 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