1.4 The circulatory system in humans

Practice questions on The circulatory system in humans

• Explain how the structure of a red blood cell is adapted for its function of carrying oxyg… (4 marks, Explain)
• Explain what happens to the blood pressure and blood flow in the heart during one complete… (4 marks, Explain)
• Explain why the heart is described as a double circulatory pump. (4 marks, Explain)
• Describe the route that a red blood cell takes through the heart, starting in the right at… (4 marks, Describe)
• Explain why the left ventricle has a thicker muscular wall than the right ventricle. (4 marks, Explain)
• Describe the role of the valves in the heart. (4 marks, Describe)
• Describe the functions of platelets and plasma in the blood. (4 marks, Describe)
• Explain how white blood cells protect the body against pathogens. (4 marks, Explain)
• Explain why the human body needs both a circulatory system and blood to supply cells with … (4 marks, Explain)
• Describe the role of red blood cells in transporting oxygen around the body. (4 marks, Describe)