Year 10 - Physical education
The relationship between heart rate, stroke volume and cardiac output
Anatomy and physiology: the cardio-respiratory system
Study Hub
Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit will examine the structure and function of both the cardiovascular and respiratory systems. It includes the correct anatomical names and location of different chambers, valves and blood vessels as well as the pathway of air through to the alveoli and how gaseous exchange occurs.
Lesson Summary
You will learn to explain the relationship between heart rate, stroke volume and cardiac output.
Key Notes
- Heart rate is the number of times the heart beats per minute (bpm).
- Stroke volume is the volume of blood pumped by the heart with each beat (measured in millilitres, mL).
- Cardiac Output is the volume of blood pumped by the heart per minute (measured in litres per minute, L/min).
- Cardiac output (Q) is calculated by multiplying the heart rate (HR) by the stroke volume (SV).
- A heart rate graph shows exercise intensity over a period of time.
Vocabulary To Learn
- heart rate: the number of times the heart beats per minute (bpm)
- stroke volume: the volume of blood pumped out of the heart by each ventricle with each beat (measured in millilitres, ml)
- cardiac output: the volume of blood pumped per minute by each ventricle of the heart (measured in litres per minute, l/min). Calculated as heart rate x stroke volume
Common Mistakes To Avoid
- Pupils often draw heart rate down to zero on a line graph.
3 Quick Questions (With Answers)
1. Explain the lesson in two key points.
Heart rate is the number of times the heart beats per minute (bpm). Stroke volume is the volume of blood pumped by the heart with each beat (measured in millilitres, mL).
2. What does this key word mean in this lesson? 'heart rate'
the number of times the heart beats per minute (bpm).
3. Correct this common mistake.
Mistake: Pupils often draw heart rate down to zero on a line graph. Correction: Even at rest your heart is still beating, on average 72 beats per minute, to ensure blood is always circulating around the body to keep you alive.
More Lessons In This Unit
- A practical exploration of how the cardio-respiratory systems work together Study Guide
- A practical exploration of the pathway of blood Study Guide
- Air pathway from the atmosphere to alveoli and gaseous exchange Study Guide
- Blood vessels and blood cells Study Guide
- Blood vessels, blood cells and the vascular shunt Study Guide
- Double circulatory system and structure of the heart Study Guide
- Mechanics of breathing and interpretation of a spirometer trace Study Guide
- Structure of the cardiovascular system Study Guide
- The cardiac cycle Study Guide
- The mechanics of breathing Study Guide
- The structure of the heart Study Guide
Browse all guides in the Year 10 Physical education guide library.