Describe how exercise affects our breathing.

Exercise makes us breathe faster, and deeper, pulling more air into our lungs.

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Explain the benefits of regular exercise on the respiratory system.

  1. Stronger breathing muscles for better chest expansion.
  2. Increased lung capacity for more air intake.
  3. More blood vessels in the lungs for better oxygen use.
  4. An increase in alveoli numbers, boosting the oxygen supply to our blood.

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What is asthma?

Asthma is a condition where someone's airways get very sensitive and narrow. 

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Describe three symptoms of an asthma attack.

  1. Having trouble breathing.
  2. Wheezing when breathing out.
  3. Feeling a tightness in the chest.

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Name four harmful substances found in cigarette smoke.

  1. Carbon monoxide
  2. Nicotine
  3. Tar
  4. Particulates

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How does carbon monoxide affect the body?

Carbon monoxide takes the place of oxygen in your blood, meaning less oxygen gets to your organs and muscles.


This can make you feel tired and can harm your heart and brain over time.

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What are the effects of nicotine on the body?

Nicotine is addictive, making it difficult to give up smoking once you start.


It increases heart rate and blood pressure, making your heart work harder.

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How does tar affect the respiratory system?

Tar sticks to the tiny hairs in your airways, leading to a build-up of mucus and coughing.


It leads to diseases such as bronchitis and emphysema.


It is carcinogenic and causes lung cancer.

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