Cortical meshwork

There are two types of bone (a) compact or cortical bone and (b) trabecular or cancellous bone. Cortical bone is found principally in the shafts (diaphyses) of long bones. It consists of a number of irregularly spaced overlapping cylindrical units termed Haversian systems. Each consists of a central Haversian canal surrounded by concentric lamellae of bony tissue. Trabecular bone is found principally at the ends of long bones and flat bones. It is composed of a meshwork of trabeculae within which... 

Trabecular bone is a meshwork of struts giving it a large surface area that is in close contact with the bone marrow cavity for bone turnover and metabolic activity. Cortical bone is formed in layers and is highly calcified (about 80% to 90%). Because of these different structures and environments, trabecular bone is more metabolically active and cortical bone is more structurally strong and protective. 

Ponti, A. Vallotton, R Salmon, W. C. Waterman-Storer, C. M. Danuser, G Computational analysis of F-actin turnover in cortical actin meshworks using fluorescent speckle microscopy. Biophys. J. 2003, 84, 3336-3352. 

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