. (Image credit: “Cardiac Skeleton" by Julie Jenks is a derivative from the original work of Daniel Donnelly and is licensed under CC BY 4.0)
Masses of dense irregular connective tissue make up the cardiac skeleton. provides insertions for cardiac muscle.
The cardiac skeleton surrounds the four valves positioned in the plane between the atria and ventricles and extends down into the interventricular septum as well.
It provides insertions for cardiac muscle.

. (Image credit: “Cardiac Skeleton" by Julie Jenks is a derivative from the original work of Daniel Donnelly and is licensed under CC BY 4.0)