Fibrous trigone

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Fibrous trigone
Latin	trigonum fibrosum dextrum cordis, trigonum fibrosum sinistrum cordis, trigona fibrosa
Gray's	subject #138 536

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 ox and elephant.

[edit] See also

• Cardiac skeleton

[edit] External links

• GPnotebook 261750843, Dorlands/Elsevier t_19/12823467 - "left fibrous trigone"
• GPnotebook 798621756, Dorlands/Elsevier t_19/12823459 - "right fibrous trigone"
• Histology (see slide #96)

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 As such, some of the information contained herein may be outdated.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.

v • d • e Anatomy of torso, cardiovascular system: heart

atria (interatrial septum, musculi pectinati) • ventricles (interventricular septum, trabeculae carneae, chordae tendinae, papillary muscle) • valves base • apex • grooves (coronary/atrioventricular, interatrial, anterior interventricula, posterior interventricular) • surfaces (sternocostal, diaphragmatic) • borders (right, left) right heart (vena cavae, coronary sinus) → right atrium (auricle, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of the inferior vena cava, valve of the coronary sinus) → tricuspid valve → right ventricle (conus arteriosus, moderator band/septomarginal trabecula)  → pulmonic valve → (pulmonary artery and pulmonary circulation) left heart (pulmonary veins) → left atrium (auricle) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation) pericardium  (sinus) • epicardium • myocardium • endocardium • cardiac skeleton (fibrous trigone, fibrous rings) conduction system cardiac pacemaker • SA node • AV node• bundle of His • Purkinje fibers