Difference between revisions of "Alveoli"
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| style="height:20px; width:400px; text-align:center;" |A [[diagram]] showing a single [[alveolus]] with the [[Oxygen]] going into the [[blood]] and [[Carbon Dioxide]] leaving the [[blood]]. | | style="height:20px; width:400px; text-align:center;" |A [[diagram]] showing a single [[alveolus]] with the [[Oxygen]] going into the [[blood]] and [[Carbon Dioxide]] leaving the [[blood]]. | ||
|} | |} | ||
+ | |||
+ | ==Key Stage 4== | ||
+ | ===Meaning=== | ||
+ | [[Alveoli]] are small air sacs in the [[lungs]] which are specially [[Adaptation|adapted]] for gas exchange. | ||
+ | |||
+ | ===Adaptations of Alveoli=== | ||
+ | : The walls of the [[alveoli]] separating the [[air]] from the [[blood]] are very thin allowing [[gas]]es to diffuse quickly. | ||
+ | : The [[blood]] supply to the [[alveoli]] is very good to constantly supply of [[blood]] with little [[Oxygen]] and a lot of [[Carbon Dioxide]] keeping a high [[Concentration Gradient|concentration gradient]]. | ||
+ | : The walls of the [[alveoli]] are kept moist to allow gases to [[dissolve]] into to the fluid for gas exchange with the [[blood]]. |
Revision as of 20:49, 8 November 2018
Contents
Key Stage 3
Meaning
Alveoli are small air sacs in the lungs which are specially adapted for gas exchange.
A picture showing several alveoli and the capillaries supplying them with blood. |
Adaptations of Alveoli
- The alveoli have thin walls to allow gas exchange to happen quickly.
- Alveoli are in groups to make a large surface area in the lung for gas exchange.
- The alveoli have a good blood supply to allow gas exchange with the blood.
- The walls of the alveoli are kept moist to allow gases to dissolve into to the fluid for gas exchange with the blood.
About Alveoli
- The alveoli are where Oxygen enters the blood and Carbon Dioxide leaves the blood.
- There are thousands of alveoli in each lung.
- Alveoli are found at the end of bronchioles.
A diagram showing a single alveolus with the Oxygen going into the blood and Carbon Dioxide leaving the blood. |
Key Stage 4
Meaning
Alveoli are small air sacs in the lungs which are specially adapted for gas exchange.
Adaptations of Alveoli
- The walls of the alveoli separating the air from the blood are very thin allowing gases to diffuse quickly.
- The blood supply to the alveoli is very good to constantly supply of blood with little Oxygen and a lot of Carbon Dioxide keeping a high concentration gradient.
- The walls of the alveoli are kept moist to allow gases to dissolve into to the fluid for gas exchange with the blood.