Starter quiz
- Which of the following terms refers to breathing out?
- exhale ✓
- inhale
- perspire
- inspire
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- What happens when we breathe out?
- The ribs move up and out while the diaphragm flattens down.
- The ribs move down and in while the diaphragm flattens down.
- The ribs move down and in while the diaphragm moves up into a dome. ✓
- The ribs move up and out while the diaphragm moves into a dome.
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- Another word for inspire is ...
- 'inhale' ✓
- Which of the following does diastole refer to?
- the heart relaxing ✓
- the ventricles contracting
- the atria contracting
- blood being ejected from the heart
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- Match the following key terms and descriptions.
- cardiac cycle⇔the sequence of events in a heartbeat (contraction and relaxation) ✓
- heart rate⇔the number of times the heart beats per minute ✓
- stroke volume⇔the amount of blood ejected from the left ventricle per beat ✓
- cardiac output⇔the amount of blood pumped out of the heart per minute ✓
- tidal volume⇔the amount of air breathed in or out per breath ✓
- Gaseous ______ is the process where gases move from high concentration to lower concentration.
- 'exchange' ✓
Exit quiz
- Which of the following substances does the human body need to extract from the air to provide energy for movement?
- nitrogen
- oxygen ✓
- carbon dioxide
- water
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- A by-product of aerobic respiration is ______ which is expelled from the body when we breathe out.
- 'carbon dioxide' ✓
- Arrange these components of the respiratory system in order from the atmosphere to the bloodstream.
- 1⇔nose and mouth
- 2⇔trachea
- 3⇔bronchi
- 4⇔bronchioles
- 5⇔alveoli
- 6⇔bloodstream
- Which of the following is incorrect?
- Gaseous exchange happens at the alveoli.
- Gaseous exchange happens at the muscle tissues.
- Oxygen moves into the bloodstream at the alveoli.
- Carbon dioxide moves into the bloodstream at the alveoli. ✓
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- Gaseous exchange occurs when oxygen or carbon dioxide move from areas of high to areas of lower ______ via diffusion.
- 'concentration' ✓
- Arrange these components of the circulatory system in the correct order for the pathway of blood from the lungs to the working muscles and back to the lungs via the heart.
- 1⇔pulmonary vein
- 2⇔left atria
- 3⇔left ventricle
- 4⇔muscles
- 5⇔right atria
- 6⇔right ventricle
- 7⇔pulmonary artery
Worksheet
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Video
Lesson Details
Key learning points
- Gaseous exchange is when oxygen and carbon dioxide move or diffuse from high concentration to lower concentration.
- Oxygen is delivered to the circulatory system and then to the working muscles.
- The respiratory system gets oxygen into the body, then the circulatory system transports it to the body.
Common misconception
All of the oxygen we breathe in is used by the muscles.
The body only extracts a small percentage of the oxygen in each breath so it is important we keep breathing during and after exercise. You can only moves gases to an area of lower concentration so once that is equal diffusion stops.
Keywords
Cardio-respiratory - the combined functions of the cardiovascular system or heart and blood vessels and the respiratory system or lungs and airways
Gaseous exchange - the process where oxygen and carbon dioxide are transferred between the alveoli in the lungs and the bloodstream via capillaries
Performance - the execution of an action or the ability to achieve a task effectively and efficiently
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