Activity.... Do – Think - Learn
Here you will look at how asthma patients can relieve their symptoms with an inhaler.
Can you give the correct dose to each patient?
The Science Bit
Every time you take a breath, you draw air into your lungs (inhale). The oxygen in the air passes (diffuses) through the thin walls of the lungs and the blood vessels surrounding them. Oxygen is absorbed into the blood and distributed around the body by the blood circulatory system. Medication in a spray, powder or vapour form can be administered by taking it in with this breath of air (inhaling, inhaler). The lungs contain about 2,400 km or 1,490 miles of airways. If a lung were to be spread out, the surface would be about 180 sq metres or the same as the floor in a school hall. ‘Wheeziness’ is a sign of a lung infection.
Medicines can also be absorbed through the lungs, such as inhalers. Air inhaled travels into the windpipe, this leads to both lungs which divide into smaller and smaller branches called bronchioles. Here the gas exchange takes place and also medicines are absorbed into the blood stream.
Curriculum Links
Ourselves
- That we need to eat and drink to stay alive
Health and Growth
- That humans need food and water to stay alive
- That sometimes we take medicines when we get ill, these help us to get better
- That medicines are useful but are drugs not foods and can be dangerous
- That some people need medicines to keep them alive and healthy
- To ask questions about medicines and health
- That medicines can be dangerous if we take them without consulting parents or doctors
- To recognise hazards and risks in medicines and how to avoid these
- To communicate information about the safe use of medicines
Keeping healthy
- That the heart and lungs are protected by the ribs