haversian canal


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Related to haversian canal: Volkmann's canal, canaliculi

canal

 [kah-nal´]
a relatively narrow tubular passage or channel.
adductor canal Hunter's canal.
Alcock's canal a tunnel formed by a splitting of the obturator fascia, which encloses the pudendal vessels and nerve.
alimentary canal see alimentary canal.
anal canal the terminal portion of the alimentary canal, from the rectum to the anus.
atrioventricular canal the common canal connecting the primordial atrium and ventricle; it sometimes persists as a congenital anomaly.
birth canal the canal through which the fetus passes in birth.
carotid canal one in the pars petrosa of the temporal bone, transmitting the internal carotid artery to the cranial cavity.
cervical canal the part of the uterine cavity lying within the cervix.
condylar canal an occasional opening in the condylar fossa for transmission of the transverse sinus; called also posterior condyloid foramen.
canal of Corti a space between the outer and inner rods of Corti.
femoral canal the cone-shaped medial part of the femoral sheath lateral to the base of Gimbernat's ligament.
haversian canal any of the anastomosing channels of the haversian system in compact bone, containing blood and lymph vessels, and nerves.
Hunter's canal a fascial tunnel in the middle third of the medial part of the thigh, containing the femoral vessels and saphenous nerve. Called also adductor canal.
hypoglossal canal an opening in the occipital bone, transmitting the hypoglossal nerve and a branch of the posterior meningeal artery; called also anterior condyloid foramen.
infraorbital canal a small canal running obliquely through the floor of the orbit, transmitting the infraorbital vessels and nerve.
inguinal canal the oblique passage in the lower anterior abdominal wall on either side, through which passes the round ligament of the uterus in the female, and the spermatic cord in the male.
medullary canal
optic canal a passage for the optic nerve and ophthalmic artery at the apex of the orbit; called also optic foramen.
pulp canal root canal.
root canal that part of the pulp cavity extending from the pulp chamber to the apical foramen. Called also pulp canal.
sacral canal the continuation of the spinal canal through the sacrum.
Schlemm's canal venous sinus of sclera.
semicircular c's see semicircular canals.
spinal canal (vertebral canal) the canal formed by the series of vertebral foramina together, enclosing the spinal cord and meninges.
Volkmann's c's canals communicating with the haversian canals, for passage of blood vessels through bone.

haversian canal

(hə-vûr′zhən)
n.
Any of various canals in compact bone through which blood vessels, nerve fibers, and lymphatics pass.

haversian canal

[havur′shən]
Etymology: Clopton Havers, English physician, 1650-1702
one of the many tiny longitudinal canals in bone tissue, averaging about 0.05 mm in diameter. Each contains blood vessels, connective tissue, nerve filaments, and occasionally lymphatic vessels. The canals are interconnected and part of an intricate network. See also haversian canaliculus, haversian system, Volkmann's canal.

Haversian canal

one of many channels formed within bone by the development of OSTEOBLASTS in concentric rings around them, and whose function is to facilitate the linking of the living parts. Each canal may contain an artery, a vein and a nerve, and the canals ramify throughout the bone, communicating with the bone marrow and the PERIOSTEUM. The Haversian systems are mainly longitudinal, but cross-connections are present.

canal

a relatively narrow tubular passage or channel.

accessory canal
see lateral canal (below).
alar canal
in the body of the basisphenoid bone, transmits the maxillary artery.
alimentary canal
the digestive tube from mouth to anus. See also alimentary canal.
anal canal
the terminal portion of the alimentary canal, from the rectum to the anus.
atrioventricular canal
the common canal connecting the primitive atrium and ventricle; it sometimes persists as a congenital anomaly.
birth canal
the canal through which the fetus passes in birth.
carotid canal
one in the pars petrosa of the temporal bone, transmitting the internal carotid artery to the cranial cavity.
carpal canal
on the palmar surface of the equine carpus where the carpal groove is converted into a canal by the flexor retinaculum which stretches from the accessory carpal bone to the medial side of the carpus. It houses the flexor tendons.
central brain canal
lumen of the neural tube of the embryo within the brain.
cervical canal
the part of the uterine cavity lying within the cervix.
condyloid canal
in the occipital bone; transmits a vein.
canal of Corti
a space between the outer and inner rods of Corti.
external ear canal
the canal from the external auditory meatus to the eardrum.
facial canal
osseous tube in the temporal bone that transmits the facial nerve.
femoral canal
in the groin on the medial aspect of the thigh; contains the femoral artery and vein.
c's of Gartner
in the ventral wall of the vagina; they are remnants of the mesonephric ducts and very variable in their occurrence. Called also ductus epoophori longitudinales.
haversian canal
see haversian canal.
c's of Hering
openings between the bile canaliculi and the cholangioles, the terminal ducts of the biliary duct system. Called also cholangiole.
hyaloid canal
central canal of the vitreous humor running from the lens to the optic disk.
hypoglossal canal
an opening in the occipital bone, transmitting the hypoglossal nerve and a branch of the posterior meningeal artery; called also anterior condyloid foramen.
infraorbital canal
a canal running obliquely from the front of the orbit to the side of the muzzle, transmitting the infraorbital vessels and nerve. In the horse it passes through the maxillary sinus.
inguinal canal
the oblique passage in the caudal abdominal wall on either side, through which passes the round ligament of the uterus in some females such as the bitch and the spermatic cord in the males.
intestinal canal
small and large intestines.
lacrimal canal
the nasolacrimal canal.
lateral canal
a small canal in the root of a tooth which emerges on the side, rather than the apex. Called also accessory canal.
mandibular canal
a passageway within the mandible for conduction of the inferior alveolar vessels and nerve; the inferior alveolar nerve enters the mandibular canal through the mandibular foramen and exits at the mental foramen supplying nerves to the lower cheek teeth in passing.
medullary canal
1. vertebral canal.
2. the cavity, containing marrow, in the diaphysis of a long bone; called also marrow or medullary cavity.
metatarsal canal
formed by the metatarsal fascia on the plantar aspect of the chief metatarsal bone of the horse; transmits the tendons of the digital flexor muscles.
modiolar canal
in the cochlea of the internal ear; it transmits blood vessels and nerves to the cochlea.
nasolacrimal canal
in the maxilla it transmits the nasolacrimal duct.
nutrient c's
large vascular canals through the cortex of bones. See also haversian canal.
omasal canal
the direct passage through the omasum from the reticulum to the abomasum.
optic canal
a passage for the optic nerve through the cranium into the orbit.
palatine canal
formed by the maxilla and the palatine bone; transmits the palatine artery and nerve.
pterygoid canal
in the basisphenoid bone; contains the pterygoid nerve.
root canal
see root canal.
sacral canal
the part of the vertebral canal through the sacrum.
Schlemm's canal
the venous sinus of the sclera, a circular canal at the junction of the sclera and cornea that receives the aqueous humour. Called also scleral venous sinus.
semicircular c's
the canals (anterior, lateral and posterior) of the bony labyrinth of the ear. See also semicircular canals.
spinal canal, vertebral canal
the canal formed by the series of vertebral foramina together, enclosing the spinal cord and meninges.
supraorbital canal
in the frontal bone; transmits the frontal vein, passing through the zygomatic process to the orbital cavity.
tarsal canal
formed by the plantar annular ligament of the tarsus which roofs over the tarsal groove; transmits the deep digital flexor tendon and plantar vessels.
triosseus canal
the foramen at the junction of the coracoid, clavicle and scapula which transmits the tendon of a flight muscle, the supracoracoideus, in the avian skeleton.
vertebral canal
spinal canal.
Volkmann's c's
canals communicating with the haversian canals, for passage of blood vessels through bone from the periosteum.

haversian

named after the English physician and anatomist Clopton Havers, 1650-1702.

haversian canal
any of the anastomosing axial channels of the haversian system in compact bone, containing blood and lymph vessels, and nerves.
haversian glands
synovial villi.
haversian system
the basic unit of compact bone consisting of a haversian canal and its concentrically arranged cylindrical lamellae. Called also osteon.