Fig. 5.1 presents a diagram of one section of the human circulatory system.
(a)[2]
On Fig. 5.1, label the pulmonary artery and the pulmonary vein.
(b)[2]
State two ways in which the structure of a vein is different from that of an artery.
(c)[4]
Table 5.1 lists the components of blood. Complete Table 5.1 so that it shows the functions of these components.
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