Fig. 6.1 shows sections through the heart, with stages A and B of the cardiac cycle illustrated in the diagram.
(a)[2]
Name stage B in Fig. 6.1 and state one diagram feature that supports your answer.
(b(i))[1]
On Fig. 6.1, draw a label line to identify one semilunar valve and mark it S.
(b(ii))[2]
Describe the function of the semilunar valves during the cardiac cycle.
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