Haversian canal

(noun)

A hollow channel in the center of an osteon, running parallel to the length of a bone.

Related Terms

  • perichondrium
  • anastomose
  • Volkmann's canal

Examples of Haversian canal in the following topics:

  • Supply of Blood and Nerves to Bone

    • Blood is supplied to mature compact bone through the Haversian canal.
    • The canals and the surrounding lamellae (8–15) are called a Haversian system or an osteon.
    • A Haversian canal generally contains one or two capillaries and nerve fibers.
    • Volkmann's canals are channels that assist with blood and nerve supply from the periosteum to the Haversian canal.
    • The Haversian canals surround blood vessels and nerve cells throughout the bone.
  • Microscopic Anatomy of Bone

    • The basic microscopic unit of bone is an osteon (or Haversian system).
    • Each osteon consists of a lamellae of compact bone tissue that surround a central canal (Haversian canal).
    • The Haversian canal contains the bone's blood supplies.
  • Connective Tissues: Bone, Adipose, and Blood

    • A blood vessel and a nerve are found in the center of the osteon within a long opening called the Haversian canal, with radiating circles of compact bone around it known as lamellae.
    • Blood vessels, nerves, and lymphatic vessels are found in the central Haversian canal.
    • Rings of lamellae surround the Haversian canal.
  • Bone

    • Compact bone tissue consists of units called osteons or Haversian systems.
    • Each osteon consists of lamellae, layers of compact matrix that surround a central canal (the Haversian or osteonic canal), which contains the bone's blood vessels and nerve fibers.
    • Compact bone tissue consists of osteons that are aligned parallel to the long axis of the bone and the Haversian canal that contains the bone's blood vessels and nerve fibers.
  • Development of the Skeleton

    • These layers subsequently encroach upon the mesh, under the periosteum, and around the larger vascular channels that become the Haversian canals, thickening and developing the bones.
  • Canals

  • Transportation: Roads, Canals, and Railroads

    • In 1808, a government-sponsored Report on the Subject of Public Roads and Canals suggested that the federal government should fund the construction of interstate turnpikes and canals.
    • Among the most important of these canals was the Erie Canal.
    • The success of the Erie Canal led to a proliferation of smaller canal routes in the region.
    • Most of the canal work was done by Irish immigrants who had previously worked on the Erie Canal.
    • The Illinois and Michigan Canal was an important canal in the nineteenth century, but was rendered obsolete when new railroads replaced it.
  • Impacted Cerumen

    • Earwax, or cerumen, is a yellowish waxy substance secreted in the ear canal which can affect hearing if produced excessively.
    • Earwax, also known by the medical term cerumen, is a yellowish waxy substance secreted in the ear canal of humans and other mammals.
    • Excessive earwax may impede the passage of sound in the ear canal, causing conductive hearing loss.
    • Cerumen is produced in the outer third of the cartilaginous portion of the human ear canal.
    • A curette method is more likely to be used by otolaryngologists when the ear canal is partially occluded and the material is not adhering to the skin of the ear canal.
  • Root Canal Therapy

    • This set of procedures is commonly referred to as a "root canal" .
    • This procedure is known as root canal therapy.
    • The alternatives to root canal therapy include no treatment, tooth extraction, or the 3Mix-MP procedure.
    • Recent studies indicate that substances commonly used to clean the root canal space incompletely sterilize the canal.
    • However, a properly restored tooth following root canal therapy yields long-term success rates near 97%.
  • Balance and Determining Equilibrium

    • Head position is sensed by the utricle and saccule, whereas head movement is sensed by the semicircular canals.
    • The semicircular canals are three ring-like extensions of the vestibule.
    • The semicircular canals contain several ampullae, with some oriented horizontally and others oriented vertically.
    • Rotational movement of the head is encoded by the hair cells in the base of the semicircular canals.
    • The movement of two canals within a plane results in information about the direction in which the head is moving, and activation of all six canals can give a very precise indication of head movement in three dimensions.
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