The Breathing System- Unit 3 0.0 / 5 ? BiologyLife processesGCSEAQA Created by: chloeewebsterrCreated on: 15-02-16 15:53 Where are the lungs? In the Thorax- top part of your body which is separated from the lower part of the body (abdomen) by the diaphragm 1 of 13 What are lungs? Like big pink sponges which are protected by the ribcage 2 of 13 The air that you breathe in goes through the what? Trachea- this then splits into two tubes called 'bronchi' and each one is called bronchus, one going to each lung 3 of 13 What happens when the bronchi is split? Splits to very small tubes called bronchioles- they end at small bags called alveoli where the gas exchange takes place 4 of 13 Explain ventilation when breathing in The intercostal muscles and diaphragm contract, the thorax volume increases and this decreases the pressure which draws air in 5 of 13 Define ventilation The movement of air into and out of the lungs- it is different from respiration 6 of 13 Explain ventilation when breathing out The intercostal muscles and diaphragm relax, the thorax volume decreases and this increases the pressure so air is forced out 7 of 13 What do artificial ventilators help people do? Breathe 8 of 13 What are ventilators? Machines that move air into or out of the lungs and it helps those who can't breathe by themselves (if they have a lung injury or disease) 9 of 13 Before ventilators there was a giant case (iron lung) which was from the neck to the abdomen, what happened when the air was pumped out of the case? The pressure drops, the lungs expanded and so air was drawn into the lungs 10 of 13 What happens when the air is pumped into the case? It has an opposite effect which forces the air out of the lungs but this however could interfere with blood flow to the lower body 11 of 13 Most ventilators work by pumping air into the lungs by doing what? The ribcage expands- when they stop pumping the ribcage relaxes and pushes air back out of the lungs 12 of 13 Ventilators don't affect the blood flow but what could they affect? It can occasionally cause damage, such as a burst alveoli, if the lungs can't cope with the artificial air flow 13 of 13
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