CAIE A-Level Biology AS 8.3.2 Wall Thickness Differences Questions
Explain wall-thickness differences among arteries, veins and capillaries using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain wall-thickness differences among arteries, veins and capillaries.
CAIE A-Level Biology AS 8.3.2 Wall Thickness Differences Questions question 1
In a double circulatory system, blood passes through the heart twice in one complete circuit of the body. The complete circuit consists of the pulmonary circulation and the systemic circulation.
Fig. 4.1 is a diagram of a vertical section through the mammalian heart. The differences in the thickness of cardiac muscle in the walls of the four chambers of the heart are shown.
Fig. 4.1
Explain, with reference to their functions, the difference in the thickness of the walls of the left ventricle and right ventricle of the heart.
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