(a)[2]
Name the blood vessel type in Fig. 1.1 and describe one visible characteristic feature of this vessel type.
(b(i))[1]
Name structure A shown.
(b(ii))[1]
Name the principal component of substance B.
(b(iii))[1]
Cell C in Fig. 1.1 is an endothelial cell. Name structure D in it.
(c)[2]
The magnification of Fig. 1.1 is $\times 6000$. Calculate the diameter of the lumen along the line X-X. Show your working and give your answer in micrometres ($\mu\text{m}$) to the nearest whole number.