AQA GCSE Biology revision notes
Animal tissues, organs and organ systems Revision Notes
Study Animal tissues, organs and organ systems with curriculum-aligned Revision Notes resources, practice links, and exam-focused support.
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Animal tissues, organs and organ systems
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Heart (5) SA node AV node Common bundle Bundle branches Purkinje fibers diagram
Specification Link
This circulation diagram is used for: Explain that the heart pumps blood around the body in a double circulatory system.
What To Explain
The heart and blood vessels work together to maintain blood flow between the lungs, body tissues and the heart.
Exam Answer Move
This links the diagram to: Explain that the heart pumps blood around the body in a double circulatory system. A strong answer follows the pathway or explains how circulation supports exchange at tissues.
Respiratory system 14 diagram
Specification Link
This circulation diagram is used for: Explain that the heart pumps blood around the body in a double circulatory system.
What To Explain
The heart and blood vessels work together to maintain blood flow between the lungs, body tissues and the heart.
Exam Answer Move
This links the diagram to: Explain that the heart pumps blood around the body in a double circulatory system. A strong answer follows the pathway or explains how circulation supports exchange at tissues.
Heart sections diagram
Specification Link
This circulation diagram is used for: Explain that the heart pumps blood around the body in a double circulatory system.
What To Explain
The heart and blood vessels work together to maintain blood flow between the lungs, body tissues and the heart.
Exam Answer Move
This links the diagram to: Explain that the heart pumps blood around the body in a double circulatory system. A strong answer follows the pathway or explains how circulation supports exchange at tissues.
Heart conduction diagram
Specification Link
This circulation diagram is used for: Explain that the heart pumps blood around the body in a double circulatory system.
What To Explain
The heart and blood vessels work together to maintain blood flow between the lungs, body tissues and the heart.
Exam Answer Move
This links the diagram to: Explain that the heart pumps blood around the body in a double circulatory system. A strong answer follows the pathway or explains how circulation supports exchange at tissues.
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