See Also: fibrous ring(medicine)
fibrous ring of heart(medicine)
fibrous ring of intervertebral disc(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
haversian(medicine)
Haversian(dictionary)
haversian spaces(medicine)
haversian system(medicine)
haversian canals(medicine)
haversian lamella(medicine)

fibrous ring of heart (medicine) and Haversian (iou)


fibrous ring of heart (medicine)


fibrous ring of heart


One of four fibrous rings that surround atrioventricular and arterial orifices of the heart, providing attachment for the valve leaflets and maintaining patency of the orifice. As part of the fibrous skeleton of the heart, the fibrous rings also provide origin and insertion for the myocardium.

Synonym: annulus fibrosus cordis, annulus fibrosus, coronary tendon, fibrous ring, Lower's ring.


Haversian (iou)



Haversian adjective. M19.
[from Clopton Havers (d. 1702), English anatomist + -IAN.]
Anatomy. Designating or pertaining to the minute cylindrical passages (Haversian canals) in bone, through which blood-vessels pass; Haversian system, a Haversian canal together with its associated tissue.