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The heart - Animal organisation - transport systems
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What is the Double Circulatory System? - Seneca …
WebTHE HEART GCSE Biology 9-1 Combined Sci (Revision & Questions) Duration: 05:39; GCSE Biology: Circulatory System Video & Practice Exam Question. Duration: 09:27; CARDIOVASCULAR DISEASE - Biology GCSE and iGCSE Exam Revision. Duration: 03:26; GCSE Science Revision Biology "Cardiovascular Diseases" WebGCSE Biology random questions Cell structure Cell division Transport in cells Digestive system Heart and blood Health issues Plant tissues, organs and systems Communicable diseases Drugs Plant disease Photosynthesis Respiration Homeostasis Nervous system Hormones Reproduction Variation and Evolution Ecosystems Biodiversity Trophic levels … WebAnswers > Biology > GCSE > Article Explain how a leaky heart valve can cause health issues A leaky heart valve is called valve regurgitation and is caused by the valves not completely closing. Any valve in the heart can have a regurgitation whether that is the aortic, mitral, pulmonary or the tricuspid valve. grace fighting vipers