FMA70881 3D mesh
Heart
A muscular pump in the chest. Its right side sends blood to the lungs; its left side sends blood through the systemic circulation.
The heart is a muscular pump with four chambers. Its valves direct blood forward through the pulmonary and systemic circuits.
The BodyParts3D reference dataset includes 23 pieces in the cardiac layer (atrial and ventricular walls, chamber cavities, and individual valve cusps/leaflets), while the composite concept "heart" (FMA7088) spans 83 pieces across cardiac, muscular, and vascular layers. Editorial note: 5 cerebral ventricular spaces are also grouped in this layer by upstream naming and are marked for future layer separation.
Propels deoxygenated blood from the right side of the heart to the lungs via the pulmonary circuit.
Pumps oxygenated blood from the left side of the heart through the systemic circulation to supply body tissues.
Maintains unidirectional blood flow across the atrioventricular (tricuspid, mitral) and semilunar (pulmonary, aortic) valves.
Review the primary anatomical landmarks below. Click Learn more to open the dedicated page for each structure, or click Select in 3D to inspect it on the interactive 3D model.
A muscular pump in the chest. Its right side sends blood to the lungs; its left side sends blood through the systemic circulation.
The chamber on the left side of the heart that receives oxygenated blood from the left atrium and ejects it into the systemic circulation via the aorta.
The chamber on the right side of the heart that receives deoxygenated blood from the right atrium and pumps it into the pulmonary trunk toward the lungs.
The superior left cardiac chamber that receives oxygenated blood returning from the lungs via the pulmonary veins.
The superior right cardiac chamber that receives systemic venous return from the superior and inferior venae cavae and the coronary sinus.
A major cusp of the left atrioventricular (mitral) valve that prevents backflow of blood from the left ventricle into the left atrium during ventricular contraction.
A leaflet of the right atrioventricular (tricuspid) valve directing blood forward from the right atrium into the right ventricle.
A semilunar cusp at the outflow of the left ventricle that opens during systole and closes to prevent regurgitation from the ascending aorta.
Every anatomical structure assigned to the Heart layer in atlas.json. Curated landmarks include a Learn more guide, and all 23 structures can be selected directly in the 3D viewer.
Launch the 3D viewer with the Heart activated. Orbit the camera, use the Exploded View slider to separate overlapping pieces, and click individual structures to inspect their FMA reference ID and anatomical metadata.
You have not selected any structures in the Heart inside the 3D viewer yet during this session. Click Explore in 3D or any structure card above to inspect a structure on the 3D model.
The heart is a four-chambered muscular pump located in the chest.
Its right side sends blood to the lungs (pulmonary circuit); its left side sends blood through the systemic circulation.
Cardiac valves (tricuspid, mitral, pulmonary, and aortic) direct blood forward and prevent backflow.
In the 3D atlas, selecting the composite concept "heart" (FMA7088) highlights all 83 constituent sub-structures.
The heart drives blood directly into the pulmonary trunk and ascending aorta, powering arterial delivery throughout the body.
Systemic veins (via the venae cavae) and pulmonary veins return blood back into the right and left atria of the heart.
The right side of the heart pumps blood to the lungs where gas exchange replenishes oxygen and removes carbon dioxide.
Select an answer for each question below to verify your understanding of the heart.