Definitions for haversian canals

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The Nuttall Encyclopedia

  1. Haversian Canals

    canals in the bones to convey the vessels that nourish them.


  1. Haversian canal

    Haversian canals are a series of microscopic tubes in the outermost region of bone called cortical bone that allow blood vessels and nerves to travel through them. Each haversian canal generally contains one or two capillaries and nerve fibres. The channels are formed by concentric layers called lamellae. The haversian canals surround blood vessels and nerve cells throughout bones and communicate with bone cells through connections called canaliculi. This unique arrangement is conducive to mineral salt deposits and storage which gives bone tissue its strength. In mature compact bone most of the individual lamellae form concentric rings around larger longitudinal canals within the bone tissue. These canals are called haversian canals. Haversian canals are contained within osteons, which are typically arranged along the long axis of the bone in parallel to the surface. The canals and the surrounding lamellae form the functional unit, called a haversian system or osteon.


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