(a)[2]
Explain why the muscular wall of the left ventricle is thicker than that of the right ventricle.
(b(i))[2]
Name the blood vessels marked F and G. F ………………………………………… G …………………………………………
(b(ii))[1]
Name the stage of the cardiac cycle shown at K.
(c)[5]
Describe what occurs in the heart between stages H and J as shown in Fig. 2.1.