Heart Anatomy

Right atrium

Right ventricle

Left atrium

Left ventricle

Tricuspid valve

Bicuspid (mitral) Valve

Chordae Tendinae

Fibers (heart strings) attatched to the tricuspid and mitral valve which pull it closed when papillary muscles contract, preventing back flow of blood

Papillary Muscles

responsible for pulling the atrioventricular valves closed by means of the chordae tendineae

Moderator Band

muscular band of heart tissue that carries a portion of the right bundle branch

Aorta

Pulmonary Artery/Trunk

Pulmonary Veins

Inferior Vena Cava

Superior Vena Cava

Semilunar Valve of Aorta

Semilunar Valve of Pulmonary Trunk

Interventricular Septum

Auricle

lumpy and wrinkled flap of the atria

Pericardium

Membrane surrounding the heart

Epicardium

outer layer of the heart

Endocardium

inner lining of the heart

Myocardium

muscular, middle layer of the heart

Pectinate Muscles

internal ridges of myocardium in right atrium and both auricles

Apex of heart

Trabeculae Carneae

muscular ridges on the internal surface of the ventricles

Ligamentum Arteriosum

This structure is a remnant of a fetal vessel that connected the pulmonary trunk and the aorta.