4 IGCSE Biology resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter IGCSE SubjectClear filter Biology Exam board Edexcel TopicClear filter Gas Exchange Resources Crossword Flashcards Mindmap Multi-tool Quizsearch Alveoli IGCSE, Biology Mindmap 4.5 / 5 Tobacco Problems IGCSE, Biology Mindmap Gas Exchange in Humans IGCSE, Biology 14 flashcards Adaption of Leaves for Gas Exchange IGCSE, Biology Mindmap 1.0 / 5 Search again