The Layers of the Heart
This image shows the eight spiraling layers of muscle that make up the outside of the heart. View this video where Frank explains more about the source of these layers and their relation to the chestahedron.
Warning: Trying to access array offset on value of type bool in /var/www/wp-content/themes/galleria-metropolia/theme-framework/theme-style/function/template-functions.php on line 707
