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✨ Overview
These notes provide a clear and structured explanation of the human heart and circulation
system, designed for quick revision and high exam performance.
1. Structure of the Human Heart
The human heart has four chambers:
• Right Atrium
• Right Ventricle
• Left Atrium
• Left Ventricle
2. Blood Flow in the Heart
Body → Right Atrium → Right Ventricle → Lungs → Left Atrium → Left Ventricle → Body
3. Types of Circulation
• Pulmonary Circulation – Between heart and lungs
• Systemic Circulation – Between heart and body
4. Functions of the Heart
• Pumps blood throughout the body
• Supplies oxygen and nutrients
• Removes carbon dioxide and waste