haversian canal
Học thuậtThân thiện
A diagram shows a haversian canal at the center of an osteon in compact bone.
Definition
Noun: 1. A microscopic channel in compact bone: A Haversian canal is one of the many minute, cylindrical canals that run parallel to the long axis of a bone. It forms the central channel of an osteon (the fundamental structural unit of compact bone) and contains blood vessels, lymphatic vessels, and nerves, which supply nutrients and innervation to the living bone cells (osteocytes) housed in the surrounding bone matrix.
Usage Examples
- Noun:
- Under the microscope, you can see the Haversian canal at the center of each osteon, surrounded by concentric rings of bone tissue.
- The blood vessels within the Haversian canal are essential for delivering oxygen to the dense bone.
- Damage to the contents of a Haversian canal can impair the health of the surrounding bone.
Advanced Usage
- Haversian system (Osteon): This is the complete functional unit, consisting of the central Haversian canal and the surrounding concentric lamellae of bone. The Haversian canal is the core component of this system.
- Each Haversian system, with its central Haversian canal, acts like a tiny pillar giving strength to the bone.
Variants and Related Words
- Volkmann's canal (noun): A microscopic canal in bone that runs perpendicular or obliquely to the Haversian canals, connecting them and allowing blood vessels to communicate between different osteons.
- Osteon (noun): The fundamental, cylindrical structural unit of compact bone, also known as a Haversian system. A Haversian canal is its central feature.
- Lamella (noun): One of the thin, concentric layers of bony matrix that surround a Haversian canal.
Synonyms
- Central canal (of an osteon): A descriptive synonym often used in anatomical contexts.
- Osteonic canal: A less common but technically accurate synonym.
A diagram shows a haversian canal at the center of an osteon in compact bone.
Noun
- any of the many tiny canals that contain blood vessels and connective tissue and that form a network in bone