Unit 7 (H420)
OCR
Here are the best resources to pass Unit 7 (H420). Find Unit 7 (H420) study guides, notes, assignments, and much more.
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Lecture notes
Exchange surfaces 3.1.1
Detailed notes on exchange surfaces, including ventilation in humans, insects and fish. Notes written using OCR Biology A textbooks, past papers and more. Written by a student with all A*s at GCSE with an offer for Natural Sciences at Cambridge.
Summary
Chapter 7 OCR BIO - Exchange and Transport Revision Notes
PopularComprehensive and in-depth notes on the biological aspects of this chapter, using specification points as headings to ensure that all required material is included- and no irrelevant content (like many of the textbooks). Created and used by an A-Level Biology student for the NEW SPECIFICATION from 2016. 

Flashcards
Heart structure
Flashcards
Cardiac cycle
Flashcards
Spirometer
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OCR A Level Biology AS Revision Notes
Comprehensive and in-depth notes on the biological aspects of the AS OCR biology course, using specification points as headings to ensure that all required material is included- and no irrelevant content (like many of the textbooks). Created and used by an A-Level Biology student for the NEW SPECIFICATION from 2016.