Heart

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3D Interactive Heart Anatomy Explorer

Comprehensive visualization of cardiac structures including chambers, valves, arteries, veins, and nerves. Click on any structure to view detailed information.

Cardiac Structure Details

Select a structure to view anatomical information

Human Heart Anatomy

Overview

The human heart is a muscular organ that pumps blood through the circulatory system. It's divided into four chambers: two atria and two ventricles. The heart's electrical conduction system controls the heartbeat, while valves ensure unidirectional blood flow.

Key Facts

• Size: Approximately the size of a fist
• Weight: 250-350 grams in adults
• Beats per day: ~100,000 times
• Blood pumped daily: ~7,500 liters
• Layers: Endocardium, myocardium, epicardium

Select a Structure

Right Atrium Chamber

Left Atrium Chamber

Right Ventricle Chamber

Left Ventricle Chamber

Aortic Valve Valve

Mitral Valve Valve

Aorta Artery

Pulmonary Artery Artery

Superior Vena Cava Vein

Inferior Vena Cava Vein

Sinoatrial Node Nerve

Atrioventricular Node Nerve

Right Atrium

Anatomical Details

The right atrium receives deoxygenated blood from the body through the superior and inferior vena cava and pumps it into the right ventricle through the tricuspid valve.

Dimensions & Measurements

• Volume: 40-60 mL
• Wall thickness: 2-3 mm
• Pressure: 2-6 mmHg

Clinical Significance

The right atrium is crucial for cardiac function. Conditions affecting it include atrial fibrillation, atrial flutter, and atrial septal defects. Enlargement can indicate pulmonary hypertension or tricuspid valve disease.

Blood Supply & Innervation

• Blood supply: Sinoatrial nodal artery (60% from RCA)
• Innervation: Vagus nerve (parasympathetic), sympathetic nerves

Artery

Vein

Chamber

Valve

Nerve