How do osteocytes communicate with other bone cells?

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Internal structure of a human long bone — bone A long bone of the human body, showing a magnified cross section of the interior.

Osteocytes communicate with other bone cells through an extensive system known as the lacuno-canalicular network.1

Although osteocytes are embedded within the mineralized bone matrix, they are not isolated. Each cell possesses numerous long, slender cytoplasmic extensions called dendritic processes. These processes extend through microscopic channels in the bone matrix known as canaliculi.1

This network serves several critical functions:
* Connectivity: It physically links osteocytes to one another and to blood vessels located in the Haversian canals.1
* Exchange: It facilitates the transport of nutrients, waste products, and essential biochemical signals throughout the bone tissue.1
* Regulation: By detecting mechanical stress, osteocytes use this network to send signaling molecules—such as sclerostin, RANKL, and OPG—to coordinate the activity of osteoblasts (which form bone) and osteoclasts (which resorb bone).1

Through this sophisticated communication network, osteocytes act as the primary regulators of bone remodeling and mineral homeostasis.1