F211 Exchange and Transport Lungs What do animals need to gain from their environment to stay alive? How do these substances get to cells? What do plants.
Res7 biocontentchecklist (1) OCR Biology AS
Exchange Systems F211. Explain, in terms of surface-area-to-volume ratio, why multicellular organisms need specialised exchange surfaces and single-celled.
The lung as an organ of exchange. Learning intentions Describe the features of an efficient exchange surface with reference to diffusion of oxygen and.
The lung as an organ of exchange
Settler Describe and explain the 2 features that make an exchange surface efficient (4 marks)
