CB8 Exchange and transport in animals-SPECIFICATION

8.1 Describe the need to transport substances into and out of a range of organisms, including oxygen, carbon dioxide, water, dissolved food molecules, mineral ions and urea

8.2 Explain the need for exchange surfaces and a transport system in multicellular organisms including the calculation of surface area : volume ratio

8.3 Explain how alveoli are adapted for gas exchange by diffusion between air in the lungs and blood in capillaries

8.6 Explain how the structure of the blood is related to its function:

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