Double Circulatory System

Part of The Heart and Circulation · Section 4 of 15

DiagramUnit: OrganisationGCSE

This diagram covers Double Circulatory System within The Heart and Circulation for GCSE Biology. Heart structure, cardiac cycle, blood vessels, double circulation, heart rate control, and cardiovascular health It is section 4 of 15 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Double Circulatory System

Painted anatomical diagram of the human double circulatory system: heart at centre with a pulmonary loop on the left (blue deoxygenated vessels to the lung, red oxygenated vessels returning) and a systemic loop on the right (red oxygenated vessels to the head and body, blue deoxygenated vessels returning). Red = oxygenated, blue = deoxygenated throughout.

Advantages of Double Circulation:

  1. Complete Separation: Oxygenated and deoxygenated blood never mix
  2. High Pressure Maintained: Blood reaches body organs at high pressure for efficient delivery
  3. Efficient Oxygenation: All blood returning to body is fully oxygenated
  4. Metabolic Support: Can support high metabolic rates needed for active warm-blooded life

Practice questions for The Heart and Circulation

How many chambers does the human heart have?

  • A. 2
  • B. 3
  • C. 4
  • D. 5
1 markfoundation

Explain how the structure of an artery is related to its function.

3 marksstandard

Quick recall flashcards

What is diastole?
When the heart relaxes and the chambers fill with blood
What is systole?
When the heart contracts and pumps blood out of the ventricles

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The Cardiac Cycle: How Your Heart Beats

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Blood Vessels: Structure and Function

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