4692573
Description
Flashcards by Christopher Moore, updated more than 1 year ago
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Created by Christopher Moore
over 8 years ago
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| Question | Answer |
| 1.4 Exchanging material - The Lungs (1) | - Large organisms need exchanges surfaces. They have features to make them efficient. The lungs are adapted to be an efficient exchange surface. - Oxygen is absorbed by the lungs and CO2 is removed. |
| 1.4 Exchanging material - The Lungs (2) | - Efficient exchange surfaces have: large surface area. Thin walls/short diffusion path. Efficient transport system (Blood). - The surface area of lungs is increased by alveoli (air sacs) |
| 1.4 Exchanging material - The Lungs (3) | - Alveoli have thin walls, large surface area and good blood supply. -Lungs are ventilated to maintain steep diffusion gradient. - Oxygen diffuses into the capillaries around the alveoli. |
| Exchanging material - The Lungs Questions: 1) What makes a good exchange surface? (3 things) | Answer: 1)- Efficient exchange surfaces have: large surface area. Thin walls/short diffusion path. Efficient transport system (Blood). |
| Diagram |
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