ribonucleic acid, RNA (noun). (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell.
Osteocytes â mature osteoblasts. Osteoclasts â bone-destroying cells. Compact bone A structural unit of a compact bone is called an osteon (or Haversian system). Osteon â cylindrical structure oriented parallel to bone's long axis.Osteon consists of hollow tubes, one inside the other, called lamella.steocytes â mature osteoblasts. Osteoclasts â bone-destroying cells. Compact bone A structural unit of a compact bone is called an osteon (or Haversian system). Osteon â cylindrical structure oriented parallel to bone's long axis.Osteon consists of hollow tubes, one inside the other, called lamella.
Bone or osseous tissue is found in two different forms: compact bone. cancellous or spongey bone. Compact bone is a very dense tissue forming the outer layer of all bones and the thickened shafts or diaphyses of long bones.sseous tissue forms the variety of bones that make up the skeletal system. As such, osseous tissue directly or indirectly contributes to some very important body functions that include: support-for muscles, organs, and soft tissues. leverage and movement-the synovial joints. protection-for critical organs.