Study Notes
The double circulation system in humans involves two separate circuits for blood flow: pulmonary and systemic.
- Double Circulation — the process where blood passes through the heart twice in one complete circuit of the body. Example: Blood travels from the heart to the lungs and back, then from the heart to the rest of the body and back.
- Pulmonary Circulation — the part of the circulation system that carries blood from the heart to the lungs and back. Example: Blood is oxygenated in the lungs during this circulation.
- Systemic Circulation — the part of the circulation system that carries blood from the heart to the rest of the body and back. Example: Oxygenated blood is delivered to body tissues during this circulation.
Exam Tips
Key Definitions to Remember
- Double Circulation
- Pulmonary Circulation
- Systemic Circulation
Common Confusions
- Mixing up pulmonary and systemic circulation
- Thinking blood only passes through the heart once per cycle
Typical Exam Questions
- What is double circulation? Blood passes through the heart twice in one complete circuit.
- How does pulmonary circulation differ from systemic circulation? Pulmonary circulation involves the lungs, while systemic involves the rest of the body.
- Why is double circulation important? It ensures efficient oxygenation of blood and delivery to tissues.
What Examiners Usually Test
- Understanding of the two circuits in double circulation
- Differences between pulmonary and systemic circulation