(a(i))[3]
State the names of the blood vessels marked A, C and E in Fig. 7.1. A C E
(a(ii))[1]
State the letter in Fig. 7.1 that shows the blood vessel with the highest oxygen concentration.
(b)[3]
Describe three differences between the structure of arteries and the structure of veins.
(c(i))[2]
State two roles of white blood cells.
(c(ii))[2]
State two further main components of blood.