IGCSE O Level Biology MCQs – Practice Test 7 (Chapter 17)
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The "Transport in Mammals Quiz" App Download (Android & iOS): Veins do not require thick walls; MCQ with answers: they are required only occasionally, as they do not have to work harder, the blood pressure declines while it gets to veins, and the blood pressures is immense. Study Mammalian Eye Quiz Questions, download Google Book (Free Chapter) for biology web learning.
MCQ 31: All is true for double circulations, but that it:
MCQ 32: Veins do not require thick walls:
MCQ 33: In cardiac system oxygenated blood:
MCQ 34: In blood of mammals ,plasma:
MCQ 35: Of the total body mass, the heart weighs:
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