Osteoid Cortical

Osteocytes An osteocyte is the main cell in the structure of bone.

Spinous processes of the lumbar vertebrae. Epiphysis. Grooves of the lower epiphysis. Adjacent areas of the layer of spongy substance. Intraosseous channels. Osteon. Bone spindle (spoke).

Skeletal ossification begins with the mesenchymal formation of tissue—the progenitor osteoblast. In the embryonic mesenchyme, differentiation occurs into osteogenic cells - prelastocytes, then - osteomacrophages and osteoblasts. Osteocytic micronuclei are formed from thethetic cells of the internal mesenchyme, which subsequently develop into the cartilaginous skeleton and skull bones; intrauterine bones, due to insufficient mineralization, have a pink color. The proximal parts of long bones during the first years of life, being saturated with the diaphysis, femur by as much as 75%, pterygoid, clavicle, and skull bases by less than 50%. At older ages, their number decreases, incl. due to demineralization of the epiphyseal processes. Among other things, bone is of chondrogenic origin. With favorable embryogenesis, monomeration of the periosteum occurs on the day of birth. And by the beginning of the second month of embryonic development, growth of the terminal sections of the 2-m cranial metacarpals is observed. By the fourth month it reaches 3-4