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Compact bone is dense so that it can withstand compressive forces, while spongy bone (also called cancellous bone) has open spaces and is supportive, but also lightweight and can be readily remodeled to accommodate changing body needs.
This is the best guide to learn compact bone histology with slide image and labeled diagram; bone histology by anatomy learner
Compact bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces that contain the osteocytes, or bone cells. Compact bones make up 80 percent of the human skeleton; the remainder is spongelike cancellous bone.
Description: Diagram of Compact Bone. (a) This cross-sectional view of compact bone shows the basic structural unit, the osteon. (b) In this micrograph of the osteon, you can clearly see the concentric lamellae and central canals. LM × 40. (Micrograph provided by the Regents of University of Michigan Medical School © 2012). English labels.
Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone’s overall function. Compact bone is dense so that it can withstand compressive forces, while spongy (cancellous) bone has open spaces and supports shifts in weight distribution.
Compact bone, also called cortical bone, is the hard, stiff, smooth, thin, white bone tissue that surrounds all bones in the human body.
Compact bone is the denser, stronger of the two types of bone tissue (Figure \(\PageIndex{6}\)). It can be found under the periosteum and in the diaphyses of long bones, where it provides support and protection.
Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone’s overall function. Compact bone is dense so that it can withstand compressive forces, while spongy (cancellous) bone has open spaces and supports shifts in weight distribution.
Compact bone stands in stark contrast to trabecular bone in several ways. The functional units of compact bone are osteons; which contain a centrally located Haversian canal, encased in lamellae (concentric rings). Osteocytes can be observed in the lacunae between the osteons.
Compact bone forms the outer dense covering of bone tissue. Approximately 80% of bone in the adult human skeleton is composed of compact bone (Draper and Marshall, 2014). Compact bone is comprised of functional units called osteons.