Edexcel IGCSE Biology · Spec 2.65-2.66
Heart Structure, Valves and Exercise
Covers identify the chambers, valves, septum and major vessels, Explain one-way blood flow through the heart and Explain why exercise increases heart rate.
Biology revision video
Heart Structure, Valves and Exercise
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Spec 2.65-2.66
What you need to know
- Identify the chambers, valves, septum and major vessels
- Explain one-way blood flow through the heart
- Explain why exercise increases heart rate
Active recall
Quick check
Answer each question before opening the answer.
What is the function of the septum?
It prevents oxygenated and deoxygenated blood from mixing
Which vessel leaves the right ventricle?
The pulmonary artery
Why does heart rate increase during exercise?
To increase oxygen and glucose delivery and remove carbon dioxide and heat faster
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