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Both are skeletal bones. While cortical bone accounts for 80% of the mass of bone in the human body, it has a much lower surface area than cancellous bone due to its lower porosity. Only compact bones have osteons as a basic structural unit; spongy bones don’t have osteons. This tool helps you do just that. Compact bone appears solid and spongy bone consists of a web- or sponge-like arrangement of solidified extracelluar matrix. The outer and inner regions contain layers of lamellar bone that run circumferentially around the entire bone. They are called long bones, as their length is more than their width. Waste products are usually filtered out through these channels as well. The vessels and nerves of spongy bone travel through the spaces between trabeculae and do not need separate passageways. In spongy bone there far more uncompacted space. lamellae. There are pores and spaces even in compact bone. Compact and spongy tissues in a flat bone Contrary to compact bone, spongy bone or cancellous bone forms the interior part of the bone. There is a different layer of connective tissue proper that lines all the internal cavities of bones – the central canals of osteons in compact bone, and the exterior surface of trabeculae in spongy bone – called the endosteum. Compact bone and spongy bone are components of the osseous. Figure 1. Furthermore, both are structural bones. Osseous tissue comes in two forms, both of which are present in every bone in the body: compact bone and spongy bone. The non-long bones just rely on having spongy bones in their interior to reduce their overall mass. It makes up around 80 percent of adult bone mass. tsimmelk. Figure 6-4 The model of enlarged bone tissue you will use to identify the histological features listed above. These cells travel around the bone to areas in need of resorption. Compact bone tissue consists of units called osteons or Haversian systems. The central region of compact bone consist of osteons. The structural features of compact bone. compact bone             spongy bone               lacuna                         canaliculum, central canal               perforating canal        lamella                        circumferential lamella, trabecular                   periosteum                  endosteum                  bone marrow. It makes up around 80 percent of adult bone mass. Each osteon is a compact cylinder of concentric lamellae. Its two principle components are collagen and calcium phosphate. There are also collagen fibers that help strengthen the compact bone. A long bone has a shaft and 2 ends. The outsides of all the bones of the body are covered with a layer of irregular dense connective tissue proper called the periosteum. Cytoplasmic extensions branch out from each osteocyte and are housed in the canaliculi, the thin empty channels that again prevent the solid, mineralized extracellular material from crushing the osteocyte extensions. Under magnification you can clearly see the system of concentric circles that forms compact bone. Now, within that extracellular matrix, or within the concentric lamellae The two forms mainly differ in how the bone mineral is organized and in how much empty space there is among the solidified extracellular matrix. chapter 11 condensed notes37 Terms. The bones of the body only have compact bone on their outermost surfaces and never very deep. circular rings of hardended matrix. Spongy bone can be converted to compact bone by the action of osteoblasts, bone cells that secrete the material that creates the compact bone matrix. compact bone Two layers 1. In this video we discuss the structure of bone tissue and the components of bones. These blood vessels interconnect, by way of perforating canals, with vessels on the surface of the bone. However, unlike osteons, trabeculae do not have central canals or perforating canals containing blood vessels, lymph vessels, and nerves. Figure 6-4 The model of enlarged bone tissue you will use to identify the histological features listed above.. Bone Structure Quiz: Bone Structure Bone Development Quiz: Bone Development Bone Growth Functions of Bones Quiz: Functions of Bones Types of Bones Quiz: Bone Growth Bone Homeostasis Quiz: Bone Homeostasis While compact bone appears at first glance to be solid and uninterrupted, closer inspections reveals that the osseous tissue only makes up … Figure 6.2 The structural features of compact bone.. There are blood vessels that pass through and go into the marrow, where red blood cells are typically made. Spongy osseous tissue has similar structures to compact bone, except it is a more dispersed network of thin columns. Route for blood and nervous supply 3. Osteocytes are found in lacunae, which are the cell-shaped empty spaces that prevent the solid, mineralized extracellular material of bone from crushing the osteocytes. Compact bone is bone that consists of closely packed osteons or haversian systems.The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix.) Label the structural components of bone tissue in the diagram: Canaliculus Compact bone Haversian canal Lacuna Lamellae Osteocyte Osteon II Spongy bone Check Answer Get more help from Chegg Get 1:1 help now from expert Anatomy and Physiology tutors Osteons are long cylinders of bone that run parallel to the long axis of bone. Learn compact bone with free interactive flashcards. These travel parallel to the outer edge of the bone and are usually only a few lamellae deep before the osteons start up. 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