The mammalian circulatory system relies on specialized blood vessels to transport materials efficiently under varying pressures.
Describe three structural features of arteries that adapt them to transport blood under high pressure away from the heart.
Coronary heart disease (CHD) occurs when fatty plaques build up inside the coronary arteries, narrowing the lumen and restricting the arterial walls. Explain how this structural change reduces blood flow to the heart muscle, and how this affects cellular respiration in cardiac cells and overall cardiac function.
44 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.