Interactive 3D heart anatomy viewer — explore four chambers, great vessels, coronary arteries, heartbeat animation, and blood-flow visualization with clinical notes by Aurelia RMT.
Key Anatomical Structures
Right Atrium — Receives deoxygenated blood from the superior and inferior vena cavae; contains the sinoatrial (SA) node
Right Ventricle — Pumps deoxygenated blood to the lungs via the pulmonary trunk; thinner walls than the left ventricle
Left Atrium — Receives oxygenated blood from the four pulmonary veins
Left Ventricle — Pumps oxygenated blood to the systemic circulation via the aorta; thickest walls of all four chambers
Aorta — Great artery carrying oxygenated blood to the body; ascending, arch, and descending segments
Pulmonary Trunk — Carries deoxygenated blood from the right ventricle to the lungs
Coronary Arteries — Left main (→ LAD and LCx) and right coronary artery (RCA); supply myocardium; blockage causes myocardial infarction
Vena Cavae — Superior vena cava (upper body venous return) and inferior vena cava (lower body and abdominal venous return)
Pericardium — Fibrous sac enclosing the heart; visceral and parietal layers separated by pericardial fluid
Frequently Asked Questions
How does blood flow through the heart?
Deoxygenated blood enters the right atrium via the vena cavae, passes through the tricuspid valve into the right ventricle, then travels to the lungs via the pulmonary trunk. Oxygenated blood returns to the left atrium via pulmonary veins, flows through the mitral valve into the left ventricle, and is pumped out through the aorta.
What are the coronary arteries?
The left main coronary artery branches into the LAD and LCx arteries. The right coronary artery (RCA) supplies the right ventricle and inferior heart. Blockage causes heart attacks (myocardial infarction).
What is the normal resting heart rate?
Normal resting heart rate for adults is 60–100 beats per minute. Well-trained athletes may have rates as low as 40–50 BPM. The rate is set by the sinoatrial (SA) node in the right atrium.