Skip to main content

Unfortunately we don't fully support your browser. If you have the option to, please upgrade to a newer version or use Mozilla Firefox, Microsoft Edge, Google Chrome, or Safari 14 or newer. If you are unable to, and need support, please send us your feedback.

Publish with us
Left Fibrous Trigone
Cardiovascular System

Left Fibrous Trigone

Trigonum fibrosum sinistrum

Read more


The right and left fibrous trigones are the strongest portions of the fibrous skeleton and consist of dense connective tissue which sits around the right atrioventricular orifices.

Complete Anatomy
The world's most advanced 3D anatomy platform
Try it for Free

Key Features/Anatomical Relations

The left fibrous trigone connects the left fibrous ring to the aortic ring.


The left fibrous trigone provides structural support to the left atrioventricular and aortic valves. It also aids in the structural support of the membranous septum and serves as a direct attachment for the myocardium. The collagen of the fibrous ring helps to separate electrical activities between the chambers by insulating the propagation of electrical impulses during a heartbeat.

Learn more about this topic from other Elsevier products

Bladder Trigone

ScienceDirect image

The bladder trigone is a triangular area at the base of the bladder bounded by the internal urethral meatus and the two ureteric orifices.

Explore on ScienceDirectopens in new tab/window

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy