The shafts found in long bones are also compact bones. Compact bone tissue consists of units called osteons or Haversian systems. In woven bone the collagen fibres are random. Called also os. 2. any distinct piece of the skeleton of the body. Osteocytes & chondrocytes live in small spaces in the matrix called ____. However, in healthy mature bone there is an equilibrium between bone resorption and bone formation. Be able to recognize compact and cancellous bone in conventional and ground sections and know the structural differences between the two types. Compact bone, also known as cortical bone, is a denser material used to create much of the hard structure of the skeleton.As seen in the image below, compact bone forms the cortex, or hard outer shell of most bones in the body.The remainder of the bone is formed by cancellous or spongy bone.. Mature bone: There are two types: compact (lamellar) and spongy (trabecular or cancellous). 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. Osteons are the structural and functional units of compact bone tissue. Cancellous bone has a higher surface-area-to-volume ratio than cortical bone and it is less dense.This makes it weaker and more flexible. The organelles are structural and functional units constructed from several macromolecules bonded together. Each of these cylinders is called an osteon or Haversian system. It provides protection and strength to bones. This a nice magnification for this tissue because it provides a nicely-magnified view of several Haversian systems. Compact bone is a dense layer made up of structural units, or lacunae, arranged in concentric circles called Haversian systems (or osteons), each of which has a central, microscopic Haversian canal.A perpendicular system of Volkmann’s canals penetrate and cross between the Haversian systems, ensuring circulation into even the hardest bone structure. The particles in most solids from structural units called crystals. 24. Compact bone forms the outer ‘shell’ of bone. 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. Stain: silver stain. Compact bone (or cortical bone), forming the hard external layer of all bones, surrounds the medullary cavity (innermost part or bone marrow). Bone-resorbing cells are called ____. 56) The femur can withstand _____ times the body's weight without breaking. There are pores and spaces even in compact bone. It is permeated by an elaborate system of interconnecting vascular canals, the haversian systems, which contain the blood supply for the osteocytes; the bone is arranged in concentric layers around these canals, forming structural units called osteons ().Immature compact bone does not contain osteons and has a woven structure. On the other hand, osteocytes are the type of bone cells, including osteoblasts. They become osteocytes, the cells of mature bone, when they get trapped in the matrix. Compact Bone Tissue. Blood vessels pass through the outer periosteum and enter the bone through the central _____ _____ to nourish the osteocytes. Compact bone stands in stark contrast to trabecular bone in several ways. Each osteon is composed of concentric rings of calcified matrix called lamellae (singular = lamella). Be the first to answer! Types of bone: The first bone formed at any site is woven (or primary) bone, but this is soon replaced by lamellar bone. Fig.1. 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