(a(i))[2]
Name the blood vessel type shown in: Fig. 1 Fig. 2
(a(ii))[2]
Describe the differences in structure shown in Fig. 1 and Fig. 2 that enabled you to identify these blood vessels.
(b(i))[2]
Complete the diagram by adding one set of valves.
(b(ii))[2]
Describe the role of these valves.