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Encyclopedia > Fibrous rings of heart
Fibrous rings of heart
Latin anulus fibrosus dexter cordis, anulus fibrosus sinister cordis
Gray's subject #138 536
Dorlands/Elsevier a_50/12143716

The right and left fibrous rings of heart (anulus fibrosus cordis) surround the atrioventricular and arterial orifices, and are stronger upon the left than on the right side of the heart. The right fibrous ring is known as the anulus fibrosus dexter cordis, and the left is known as the anulus fibrosus sinister cordis. Image File history File links Please see the file description page for further information. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Elseviers logo. ... Atrioventricular (having to do with an atrium and ventricle) can refer to: Left atrioventricular opening Atrioventricular (rock band) Atrioventricular fistula Atrioventricular node The term Atrioventricular valves is used to describe the mitral valve and tricuspid valve. ... The heart and lungs, from an older edition of Grays Anatomy. ...


The atrioventricular rings serve for the attachment of the muscular fibers of the atria and ventricles, and for the attachment of the bicuspid and tricuspid valves. Atria may refer to: Atria is an alternative spelling for the Etruscan city that is now Adria in the Veneto region of Northern Italy. ... In the heart, a ventricle is a heart chamber which collects blood from an atrium (another heart chamber that is smaller than a ventricle) and pumps it out of the heart. ... The premolar teeth or bicuspids are transitional teeth located between the canine and molar teeth. ... In anatomy, the heart valves are valves in the heart that prevent blood from flowing the wrong way. ...


The left atrioventricular ring is closely connected, by its right margin, with the aortic arterial ring; between these and the right atrioventricular ring is a triangular mass of fibrous tissue, the trigonum fibrosum, which represents the os cordis seen in the heart of some of the larger animals, as the ox and elephant. The left atrioventricular ring is closely connected, by its right margin, with the aortic arterial ring; between these and the right atrioventricular ring is a triangular mass of fibrous tissue, the fibrous trigone, which represents the os cordis seen in the heart of some of the larger animals, as the... Binomial name Bos taurus Linnaeus, 1758 Cattle are domesticated ungulates, a member of the subfamily Bovinae of the family Bovidae. ... Genera and Species Loxodonta Loxodonta cyclotis Loxodonta africana Elephas Elephas maximus Elephas antiquus † Elephas beyeri † Elephas celebensis † Elephas cypriotes † Elephas ekorensis † Elephas falconeri † Elephas iolensis † Elephas planifrons † Elephas platycephalus † Elephas recki † Stegodon † Mammuthus † Elephantidae (the elephants) is a family of pachyderm, and the only remaining family in the order Proboscidea...


Lastly, there is the tendinous band, already referred to, the posterior surface of the conus arteriosus. The upper and left angle of the right ventricle forms a conical pouch, the conus arteriosus, from which the pulmonary artery arises. ...


The fibrous rings surrounding the arterial orifices serve for the attachment of the great vessels and semilunar valves. Grays Fig. ...


Each ring receives, by its ventricular margin, the attachment of some of the muscular fibers of the ventricles; its opposite margin presents three deep semicircular notches, to which the middle coat of the artery is firmly fixed. Section of an artery For other uses, see Artery (disambiguation). ...


The attachment of the artery to its fibrous ring is strengthened by the external coat and serous membrane externally, and by the endocardium internally. In the heart, the endocardium is the innermost layer of tissue that lines the chambers of the heart. ...


From the margins of the semicircular notches the fibrous structure of the ring is continued into the segments of the valves.


The middle coat of the artery in this situation is thin, and the vessel is dilated to form the sinuses of the aorta and pulmonary artery.


See also

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant. Structure of the Chordae Tendineae Valves like the Tricuspid valve and the Semilunar valves in the heart are attached to the walls of the heart by cord-like tendons called chordae tendineae. ... Each intervertebral fibrocartilage is composed, at its circumference, of laminæ of fibrous tissue and fibrocartilage, forming the annulus fibrosus. ... The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... An illustration from the 1918 edition Henry Grays Anatomy of the Human Body (or Grays Anatomy as it has more commonly become known) is an anatomy textbook widely regarded as a classic work on human anatomy. ...


 
 

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