Term
State two reasons why humans need to absorb large volumes of oxygen. |
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Definition
Any two from=
- They are large organisms with large volume of lungs
- They have a high body temperature
- High meatbolic and respiratory rates
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Term
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Definition
A pair of lobed structures made of series of highly branched tubules called bronchioles and end in air sacs called alveoli. |
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Term
Explain how the cell lining of trachea and bronchioles protect the alveoli. |
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Definition
| The cell produce mucus which traps dirt particles from the air that is breathed in. The epithelium cell moves this particles up the trachea to the throught. From there it moves into the stomach through oesaphagus. The acid in the stomach kills the microoraganisms. |
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Term
Descrobe the role of elastin fibres in alveoli. |
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Definition
They allow the alveoli to stretch as they fill with air when breathing in. They then spring back during breathing out expelling carbon dioxide. |
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Term
| Why are lungs located inside the body? |
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Definition
Air is not dense enough to support and protect these delicate structures
They will lose a great amount of water and dry out |
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