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Haversian canals [i] (sometimes canals of Havers, osteonic canals or central canals) are a series of microscopic tubes in the outermost region of bone called cortical bone. They allow blood vessels and nerves to travel through them to supply the osteocytes .
In osteology, the osteon or haversian system (/ h ə ˈ v ɜːr. ʒ ən /; named for Clopton Havers) is the fundamental functional unit of much compact bone. Osteons are roughly cylindrical structures that are typically between 0.25 mm and 0.35 mm in diameter . [ 1 ]
The cartilage cells or chondrocytes are contained in cavities in the matrix, called cartilage lacunae; around these, the matrix is arranged in concentric lines as if it had been formed in successive portions around the cartilage cells. This constitutes the so-called capsule of the space.
A bone is a rigid organ [1] that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body, and enable mobility.
In cartilage, the lacunae and hence, the chondrocytes, are isolated from each other. Materials picked up by osteocytes adjacent to blood vessels are distributed throughout the bone matrix via the canaliculi. Diameter of canaliculi in human bone is approximately 200 to 900 nm. [1]
Volkmann's canals, also known as perforating holes or channels, are anatomic arrangements in cortical bones that allow blood vessels to enter the bones from periosteum.They interconnect the Haversian canals (running inside osteons) with each other and the periosteum.
Haversian canal – Clopton Havers (1657–1702), English physician; Spiral valves of Heister – Lorenz Heister (1683–1758), German surgeon-anatomist; Loop of Henle – F. G. J. Henle (1809–1885), German pathologist; Canals of Hering – Karl Ewald Konstantin Hering (1834–1918), German physiologist
Notably, he described Haversian canals, which bear his name. [1] [4] He also described Sharpey's fibres. [1] This work was greatly praised by the Italian scientist Giorgio Baglivi, and it was published in several editions in Frankfurt and Amsterdam. [3] In 1694, he delivered the first Gale anatomy lecture, later combined as the Arris and Gale ...
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