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Haversian canal
Transverse Section Of Bone.png
Diagram of compact bone from a transverse section of a typical long bone's cortex.
Anatomical terminology
Diagram of a typical long bone showing both cortical (compact) and cancellous (spongy) bone.

Haversian canals[i] (sometimes canals of Havers, named after British physician Clopton Havers) 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 (contained in spaces within the dense bone matrix called lacunae) 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 (approx. 50 µm in diameter) 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 (8-15) form the functional unit, called a haversian system or osteon.


  1. ^ As with other medical eponyms, the adjective derived from the eponym's name is usually lowercased; thus haversian (but canal of Havers), fallopian, eustachian, and parkinsonism (but Parkinson disease); for more, see eponym > orthographic conventions.


External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Haversian_canal — Please support Wikipedia.
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257 videos foundNext > 

Haversian System

Description of the Osteon (Haversian System) anatomy.

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4.5. Haversian canal within bone - he thong Haver trong xuong.wmv

Haversian canal within bone - he thong Haver trong xuong.

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Haversian Canal Lecture.

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This is a video of the haversian canal network within the human femur (mid diaphysis). Imaged with a high resolution 3D x-ray machine. Canals are oriented ...

Haversian Canal 3D fly-through

Video showing the Haversian canal network within human femur. The canals form a network for nerve and blood supply to osteocytes within the bone.

Haversian canal - Bone Anatomy

Visualisation of osteons within a sample of human cortical bone (mid diaphysis). Data is acquired from a high resolution X-Ray CT scanner and rendered using ...

257 videos foundNext > 

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