(a)[6]
Describe the double circulation of blood in the human circulatory system and the separate functions of the two circuits.
(b)[4]
Describe the structure of a capillary and how a named material moves between capillaries and tissue fluid.
Biology 5090 · O Level · Circulatory system
Circulatory system — practice question
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Blood travels through the heart twice in a single circuit” …
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