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.
At a glance
revision notes
Resource type
Topic
Animal tissues, organs and organ systems
Revision notes
Enzymes diagram
Specification Link
This cell structure diagram is used for: Explain that digestive enzymes convert large insoluble food molecules into small soluble molecules that can be absorbed into the blood.
What To Explain
A correct answer links the visible cell structure to its function, such as control, respiration or protein synthesis.
Exam Answer Move
The mapped objective is: Explain that digestive enzymes convert large insoluble food molecules into small soluble molecules that can be absorbed into the blood. Exam answers need a structure-function link.
Pulmonary circulation 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.
Bronchi sections Healthy bronchus Inflamed bronchus diagram
Specification Link
This respiratory system diagram is used for: Describe the basic structures of the lungs that are required, including trachea, bronchi, alveoli and surrounding capillaries.
What To Explain
Efficient gas exchange depends on a large surface area, short diffusion distance and maintained concentration gradients.
Exam Answer Move
This matches the objective: Describe the basic structures of the lungs that are required, including trachea, bronchi, alveoli and surrounding capillaries. The answer should explain structure, diffusion and concentration gradients.
Alzheimer disease Severe disease Mild disease diagram
Specification Link
This nervous system diagram is used for: Explain the effects of alcohol on the liver and brain function.
What To Explain
Alcohol can affect brain function by slowing nervous-system responses and impairing coordination or decision making.
Exam Answer Move
The mapped objective is: Explain the effects of alcohol on the liver and brain function. A strong answer links the brain to nervous-system control and the effect of alcohol on function.
Related topics
Study nearby topics next
Revision hubs