Spec J247
Revise OCR GCSE Biology 2.2.4 The heart and blood vessels with the question bank, lessons, revision guides, and flashcards.
explain how the structure of the heart and the blood vessels are adapted to their functions • the structure of the mammalian heart with reference to the cardiac muscle, the names of the valves, chambers, and blood vessels into and out of the heart, the structure of the blood vessels with reference to thickness of walls, diameter of lumen, presence of valves
