View A Level Biology Gas Exchange Revision PNG. These gases diffuse a very short distance between the alveolus and the blood because the lining of the lung and the capillary are both only one cell thick. Detailed revision notes on the topic the leaf & gas exchange.
AQA A Level Biology Topic 3A Gas Exchange summary revision questions | Teaching Resources from d1uvxqwmcz8fl1.cloudfront.net These gases diffuse a very short distance between the alveolus and the blood because the lining of the lung and the capillary are both only one cell thick. This covers all the topics and modules for all specifications including 9700. The respiratory system is adapted for gas exchange.
The only way we can achieve gas exchange is through our lungs which provide a large surface area and alveoli with short diffusion pathways.
It is also called external respiration. In this gaseous exchange oxygen passes from alveoli to pulmonary capillary blood and co2. We cover all the relevant topics in the specification below Cells of a metabolically active organism need good supplies of nutrients and oxygen to supply more energy, and mammals also need thermal energy.
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